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Condensed Matter
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Selected Papers from the 8th International Conference on Superconductivity and...
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Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023)

A special issue of Condensed Matter (ISSN 2410-3896).

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 24952

Special Issue Editors

Prof. Dr. Ali Gencer

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Guest Editor
Physics Department, Science Faculty, Ankara University, Ankara 06100, Turkey
Interests: superconducting materials; MgB2; Josephson junction devices; various qubit systems; quantum computing
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Annette Bussmann-Holder

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Guest Editor
Max-Planck-Institut für Festkörperforschung, Heisenbergstr.1, D-70569 Stuttgart, Germany
Interests: ferroelectrics; antiferroelectricss; multiferroics; magnetism; phase transitions; superconductivity; nonlinear interactions
Special Issues, Collections and Topics in MDPI journals
Dr. J. Javier Campo Ruiz

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Guest Editor
Instituto de Nanociencia y Materiales de Aragón, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
Interests: multifunctional magnetic molecular materials; carbon-based magnetism; graphene; 2D materials; low dimensional magnetism; molecular spintronics; skyrmions in quantum materials; molecular refrigeration; chiral magnetism; organic magnets; magneto-calorics and quantum computation
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Valerii Vinokur

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Guest Editor
Terra Quantum AG, Kornhausstrasse 25, 9000 St. Gallen, Switzerland
Interests: topological quantum matter; superconductivity; the new state of matter; superinsulator; superconductor–insulator transition; large-scale adoption of quantum technologies
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Germán F. de la Fuente

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Guest Editor
ICMA (CSIC-Universidad de Zaragoza), Campus Río Ebro, EINA c/Mª de Luna, 3 E50018 Zaragoza, Spain
Interests: laser processing; laser induced surface modification; laser surface cleaning; laser surface micro and nanostructuring

Special Issue Information

Dear Colleagues,

The scope and topics of this ICSM conference series have been of special interest throughout the 21st century for the superconductivity and magnetism communities because new energy-saving solutions for electricity grids, transport, metrology, information, communication technologies, quantum materials, and technologies together with healthcare are their most promising potential applications. 

This Special Issue will help to coordinate and strengthen scientific and technological collaborations in the fields of superconductivity and magnetism through a variety of worldwide efforts by covering a variety of focuses ranging from fundamentals, materials, and applications of the various disciplines and viewpoints, assuring that pioneering roles in the fields of the focus sessions of interest are dealt with.

The Special Issue will address the fundamental issues, as well as explore possible novel applications which are important for advances in high technology-related industries, as week as also emerging new disruptive technologies. The ICSM will also contribute to innovation-based growth in the field of superconductivity, aiming to overcome the existing bottlenecks for widespread industrial applications in view of nanotechnologies. The key novel approach related to ICSM is the exploitation of recent spectacular progress in the design and fabrication of nanostructured materials fabricated for lower dimensions, in order to develop and implement such flux and condensate confinement patterns. This will not only substantially improve the material's critical parameters but also lead to novel functionalities of these nano-patterned materials. Due to the advanced dedicated modern technologies needed to produce nanostructured superconductors and magnetic materials, international and interdisciplinary collaboration is essential for successful implementation.

ICSM has become a high-level platform for networking as a bridge between the east and the west. The journal will waive the Article Processing Fees for selected papers presented at ICSM2023. The papers presented in the following 8 mainstreams at the ICSM2023 conference will form the scope and the contents of the Special issue.

  • A: Superconductivity: Materials, Synthesis, and Characterization
  • B: Magnetism: Materials, Synthesis, and Characterization
  • C: Interplay of Superconductivity and Magnetism
  • D: Large Scale and Energy Applications of Superconducting and Magnetic Materials
  • E: Electronic Applications of Superconducting and Magnetic Materials
  • F: Theory, Mechanisms, and Fundamentals
  • G: Cryogenics, Materials, and Engineering
  • H: Quantum Science and Technology

Prof. Dr. Ali Gencer
Prof. Dr. Annette Bussmann-Holder
Dr. J. Javier Campo Ruiz
Prof. Dr. Valerii Vinokur
Prof. Dr. Germán F. de la Fuente
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Condensed Matter is an international peer-reviewed open access quarterly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • superconductors
  • magnetic materials
  • spintronics
  • topological materials
  • heath care
  • quantum materials
  • quantum technologies

Benefits of Publishing in a Special Issue

  • Ease of navigation: Grouping papers by topic helps scholars navigate broad scope journals more efficiently.
  • Greater discoverability: Special Issues support the reach and impact of scientific research. Articles in Special Issues are more discoverable and cited more frequently.
  • Expansion of research network: Special Issues facilitate connections among authors, fostering scientific collaborations.
  • External promotion: Articles in Special Issues are often promoted through the journal's social media, increasing their visibility.
  • e-Book format: Special Issues with more than 10 articles can be published as dedicated e-books, ensuring wide and rapid dissemination.

Further information on MDPI's Special Issue polices can be found here.

Published Papers (13 papers)

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Research

Jump to: Review

13 pages, 4080 KiB  
Article
FL* Approach to the Coexistence of Fermi Arcs with Metal–Insulator Crossover in Strongly Underdoped Cuprates
by Pieralberto Marchetti
Condens. Matter 2024, 9(1), 9; https://doi.org/10.3390/condmat9010009 - 15 Jan 2024
Viewed by 1487
Abstract
We propose that one can explain the coexistence in the same range of doping and temperature of gapless Fermi arcs with the metal–insulator crossover of in-plane resistivity in strongly underdoped cuprates in terms of the FL* fractionalized Fermi liquid nature of these systems, [...] Read more.
We propose that one can explain the coexistence in the same range of doping and temperature of gapless Fermi arcs with the metal–insulator crossover of in-plane resistivity in strongly underdoped cuprates in terms of the FL* fractionalized Fermi liquid nature of these systems, and that such coexistence is not due simply to disorder effects in the resistivity. The particle excitations of this FL* system derived from variants of the t-J model are the gapless holon carrying charge with small Fermi momentum proportional to the doping, the gapful spinon carrying spin 1/2, and an emergent gauge field coupling them and the hole as a spinon–holon bound state, or more precisely resonance, due to gauge binding, with a Fermi surface respecting the topological Luttinger theorem. In our proposal, Fermi arcs are determined by the hole resonance, whereas the metal–insulator crossover is dominated by spinon–spinon (with subleading holon–holon) gauge interactions, and this dichotomy is able to explain their coexistence. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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11 pages, 2347 KiB  
Article
Fully Microscopic Treatment of Magnetic Field Using Bogoliubov–De Gennes Approach
by Vyacheslav D. Neverov, Alexander Kalashnikov, Alexander E. Lukyanov, Andrey V. Krasavin, Mihail D. Croitoru and Alexei Vagov
Condens. Matter 2024, 9(1), 8; https://doi.org/10.3390/condmat9010008 - 15 Jan 2024
Cited by 1 | Viewed by 2297
Abstract
This work introduces an algorithm designed to solve the Bogoliubov–de Gennes equations of superconductivity theory. What sets this algorithm apart is its remarkable ability to precisely and consistently consider the impact of an external magnetic field, all within the microscopic approach. The computation [...] Read more.
This work introduces an algorithm designed to solve the Bogoliubov–de Gennes equations of superconductivity theory. What sets this algorithm apart is its remarkable ability to precisely and consistently consider the impact of an external magnetic field, all within the microscopic approach. The computation scheme’s convergence is guaranteed by addressing the Biot–Savart equation for the field where the vector potential appears on both of its sides. To showcase the capabilities of this approach, we provide several key examples: the Abrikosov lattice, vortex core states, and the vortex structure in the intermediate mixed state of a superconductor. This method promises to offer valuable insights into the microscopic physics of intertype superconductivity. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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14 pages, 4996 KiB  
Article
Microwave Field-Induced Changes in Raman Modes and Magnetic Force Images of Antiferromagnetic NiO Films
by Diego Caso, Aida Serrano, Miriam Jaafar, Pilar Prieto, Akashdeep Kamra, César González-Ruano and Farkhad G. Aliev
Condens. Matter 2024, 9(1), 7; https://doi.org/10.3390/condmat9010007 - 15 Jan 2024
Cited by 2 | Viewed by 2120
Abstract
Effective control of domain walls or magnetic textures in antiferromagnets promises to enable robust, fast, and nonvolatile memories. The lack of net magnetic moment in antiferromagnets implies the need for creative ways to achieve such a manipulation. We conducted a study to investigate [...] Read more.
Effective control of domain walls or magnetic textures in antiferromagnets promises to enable robust, fast, and nonvolatile memories. The lack of net magnetic moment in antiferromagnets implies the need for creative ways to achieve such a manipulation. We conducted a study to investigate changes in magnetic force microscopy (MFM) imaging and in the magnon-related mode in Raman spectroscopy of virgin NiO films under a microwave pump. After MFM and Raman studies were conducted, a combined action of broadband microwave (0.01–20 GHz, power scanned from −20 to 5 dBm) and magnetic field (up to 3 kOe) were applied to virgin epitaxial (111) NiO and (100) NiO films grown on (0001) Al2O3 and (100) MgO substrates, following which the MFM and Raman studies were repeated. We observed a suppression of the magnon-related Raman mode subsequent to the microwave exposure. Based on MFM imaging, this effect appeared to be caused by the suppression of large antiferromagnetic domain walls due to the possible excitation of antiferromagnetic spin oscillations localized within the antiferromagnetic domain walls. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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13 pages, 1477 KiB  
Article
The Impact of Short-Range (Gaussian) Disorder Correlations on Superconducting Characteristics
by Vyacheslav D. Neverov, Alexander E. Lukyanov, Andrey V. Krasavin, Alexei Vagov and Mihail D. Croitoru
Condens. Matter 2024, 9(1), 6; https://doi.org/10.3390/condmat9010006 - 12 Jan 2024
Cited by 2 | Viewed by 1944
Abstract
The pursuit of enhanced superconducting device performance has historically focused on minimizing disorder in materials. Recent research, however, challenges this conventional wisdom by exploring the unique characteristics of disordered materials. Following the studies, disorder is currently viewed as a design parameter that can [...] Read more.
The pursuit of enhanced superconducting device performance has historically focused on minimizing disorder in materials. Recent research, however, challenges this conventional wisdom by exploring the unique characteristics of disordered materials. Following the studies, disorder is currently viewed as a design parameter that can be tuned. This shift in the paradigm has sparked an upsurge in research efforts, which demonstrates that disorder can significantly augment the superconductivity figures of merit. While almost all previous studies attended to the effects related to disorder strength, this article focuses on the impact of short-range disorder correlations that in real materials takes place, for example, due to lattice defects. The study shows that the degree of such correlations can strongly influence the superconducting characteristics. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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18 pages, 6003 KiB  
Article
Effect of Growth and Calcination Temperatures on the Optical Properties of Ruthenium-Doped ZnO Nanoparticles
by Dema Dasuki, Khulud Habanjar and Ramdan Awad
Condens. Matter 2023, 8(4), 102; https://doi.org/10.3390/condmat8040102 - 29 Nov 2023
Cited by 2 | Viewed by 2748
Abstract
This study aimed to probe the effect of heat treatment on zinc oxide nanoparticles doped with ruthenium through a chemical co-preparation technique. Pure ZnO and Ru-doped ZnO nanoparticles, with the general formula Zn1−x−RuxO, were synthesized for 0 ≤ x [...] Read more.
This study aimed to probe the effect of heat treatment on zinc oxide nanoparticles doped with ruthenium through a chemical co-preparation technique. Pure ZnO and Ru-doped ZnO nanoparticles, with the general formula Zn1−x−RuxO, were synthesized for 0 ≤ x ≤ 0.04. Using the same starting precursors, the growth temperature was 60 °C and 80 °C for set A and set B, respectively, whereas the calcination temperature was 450 °C and 550 °C for set A and set B, respectively. For the structure investigation, X-ray powder diffraction (XRD) revealed that the crystallite size of set A was smaller than that of set B. For x = 0.04 in set B, the maximum value of the crystallite size was attributed to the integration of Ru3+ ions into interstitial sites in the host causing this expansion. Fourier transform infrared spectroscopy (FTIR) confirmed the formation of zinc oxide nanoparticles by showing a Zn-O bonding peak at 421 cm−1. For x = 0.04 in set B, the divergence confirmed the change in bonding properties of Zn2+ distributed by Ru3+ doping, which verifies the presence of secondary-phase RuO2. Using UV–visible spectroscopy, the energy gap of set A swings as ruthenium doping increases. However, in set B, as the crystallite size decreases, the energy gap increases until reversing at the highest concentration of x = 0.04. The transition from oxygen vacancy to interstitial oxygen, which is associated with the blue peak (469 nm), increases in set A under low heating conditions and decreases in set B as Ru doping increases, as revealed in the photoluminescence optical spectra of the samples. Therefore, ruthenium doping proves a useful surface defect and generates distortion centers in the lattice, leading to more adsorption and a remarkable advantage in sunscreen and paint products used for UV protection. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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14 pages, 510 KiB  
Article
Topological Gauge Theory of Josephson Junction Arrays: The Discovery of Superinsulation
by Maria Cristina Diamantini
Condens. Matter 2023, 8(4), 97; https://doi.org/10.3390/condmat8040097 - 16 Nov 2023
Viewed by 1651
Abstract
We review the topological gauge theory description of Josephson junction arrays (JJA), fabricated systems which exhibit the superconductor-to-insulator transition (SIT). This description revealed the topological nature of the phases around the SIT and led to the discovery of a new state of matter, [...] Read more.
We review the topological gauge theory description of Josephson junction arrays (JJA), fabricated systems which exhibit the superconductor-to-insulator transition (SIT). This description revealed the topological nature of the phases around the SIT and led to the discovery of a new state of matter, the superinsulator, characterized by infinite resistance, even at finite temperatures, due to linear confinement of electric charges. This discovery is particularly relevant for the physics of superconducting films with emergent granularity, which are modeled with JJAs and share the same phase diagram. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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10 pages, 6302 KiB  
Article
Experimental and Numerical Investigations on the Parameters of a Synchronous Machine Prototype with High-Temperature Superconductor Armature Windings
by Hocine Menana and Yazid Statra
Condens. Matter 2023, 8(4), 94; https://doi.org/10.3390/condmat8040094 - 9 Nov 2023
Viewed by 1623
Abstract
In their applications in electrical machines, high-temperature superconductors (HTSs) are mainly used as inductors in synchronous machines due to the AC losses which can lead to high cryogenic costs. In this work, we show the possibility of their use as armature windings, handling [...] Read more.
In their applications in electrical machines, high-temperature superconductors (HTSs) are mainly used as inductors in synchronous machines due to the AC losses which can lead to high cryogenic costs. In this work, we show the possibility of their use as armature windings, handling some precautions. The approach is based on the combined use of modeling and measurements. The construction and the preliminary tests of a handmade prototype of an axial field HTS synchronous machine are presented. Several tests have been conducted at liquid nitrogen temperature. The measurements have been confirmed by modeling results. The preliminary tests on the prototype, in both modeling and measurements, are very promising. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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11 pages, 8571 KiB  
Article
Vortex Dynamics and Pinning in CaKFe4As4 Single Crystals from DC Magnetization Relaxation and AC Susceptibility
by Alina M. Ionescu, Ion Ivan, Corneliu F. Miclea, Daniel N. Crisan, Armando Galluzzi, Massimiliano Polichetti and Adrian Crisan
Condens. Matter 2023, 8(4), 93; https://doi.org/10.3390/condmat8040093 - 29 Oct 2023
Cited by 1 | Viewed by 1525
Abstract
Among various “families” of iron-based superconductors, the quite recently discovered AeAFe4As4 (where Ae is an alkali-earth metal and A is an alkali metal) has high critical current density, a very high upper critical field, and a low anisotropy, and [...] Read more.
Among various “families” of iron-based superconductors, the quite recently discovered AeAFe4As4 (where Ae is an alkali-earth metal and A is an alkali metal) has high critical current density, a very high upper critical field, and a low anisotropy, and has recently received much interest for the possibility of high magnetic field applications at the liquid hydrogen temperature. We have performed DC magnetization relaxation and frequency-dependent AC susceptibility measurements on high-quality single crystals of CaKFe4As4 with the aim of determining the pinning potential U*. The temperature dependence of U* displays a clear crossover between elastic creep and plastic creep. At temperatures around 27–28 K, U* has a very high value, up to 1200 K, resulting in an infinitesimally small probability of thermally activated flux jumps. From the dependence of the normalized pinning potential on irreversible magnetization, we have determined the creep exponents in the two creep regimes, which are in complete agreement with theoretical models. The estimation of the pinning potential from multifrequency AC susceptibility measurements was possible only near the critical temperature due to equipment limitations, and the resulting value is very close to the one that resulted from the magnetization relaxation data. Magnetic hysteresis loops revealed a second magnetization peak and very high values of the critical current density. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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11 pages, 2277 KiB  
Communication
The Depairing Current Density of a Fe(Se,Te) Crystal Evaluated in Presence of Demagnetizing Factors
by Armando Galluzzi, Krastyo Buchkov, Vihren Tomov, Elena Nazarova, Antonio Leo, Gaia Grimaldi, Adrian Crisan and Massimiliano Polichetti
Condens. Matter 2023, 8(4), 91; https://doi.org/10.3390/condmat8040091 - 23 Oct 2023
Viewed by 1625
Abstract
The effect of the demagnetizing factor, regarding the determination of the de-pairing current density Jdep, has been studied in the case of a Fe(Se,Te) crystal, using DC magnetic measurements as a function of a magnetic field (H) [...] Read more.
The effect of the demagnetizing factor, regarding the determination of the de-pairing current density Jdep, has been studied in the case of a Fe(Se,Te) crystal, using DC magnetic measurements as a function of a magnetic field (H) at different temperatures (T). First, the lower critical field Hc1(T) values were obtained, and the demagnetization effects acting on them were investigated after calculating the demagnetizing factor. The temperature behaviors of both the original Hc1 values and the ones obtained after considering the demagnetization effects (Hc1demag) were analyzed, and the temperature dependence of the London penetration depth λL(T) was obtained in both cases. In particular, the λL(T) curves were fitted with a power law dependence, indicating the presence of low-energy quasiparticle excitations. Furthermore, by plotting λL−2 as a function of T, we found that our sample behaves as a multigap superconductor, which is similar to other Fe-11 family iron-based compounds. After that, the coherence length ξ values were extracted, starting with the Hc2(T) curve. The knowledge of λL and ξ allowed us to determine the Jdep values and to observe how they are influenced by the demagnetizing factor. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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23 pages, 13693 KiB  
Article
Superconducting and Mechanical Properties of the Tl0.8Hg0.2Ba2Ca2Cu3O9−δ Superconductor Phase Substituted by Lanthanum and Samarium Fluorides
by Rola F. Khattar, Mohammed Anas, Ramadan Awad and Khulud Habanjar
Condens. Matter 2023, 8(4), 87; https://doi.org/10.3390/condmat8040087 - 7 Oct 2023
Viewed by 1388
Abstract
This study investigated the impact of samarium and lanthanum fluorides (SmF3 and LaF3) on the physical and mechanical properties of Tl0.8Hg0.2Ba2Ca2−xRxCu3O9−δ−yFy superconducting phases (specifically [...] Read more.
This study investigated the impact of samarium and lanthanum fluorides (SmF3 and LaF3) on the physical and mechanical properties of Tl0.8Hg0.2Ba2Ca2−xRxCu3O9−δ−yFy superconducting phases (specifically the (Tl, Hg)-1223 phase), where R = Sm and La, with 0.00 ≤  x  ≤ 0.10. The superconducting samples were synthesized using the solid-state reaction method. X-ray diffraction (XRD) verified the formation of the (Tl, Hg)-1223 phase without altering its tetragonal structure. Scanning electron micrographs (SEM) reveal the improvement of the grain size and inter-grain connectivity as Sm and La contents increased up to x=0.025. The electrical properties of (Tl, Hg)-1223 were studied using I-V and electrical resistivity measurements. Improved superconducting transition temperature (Tc) and transport critical current density (Jc) were observed up to x=0.025, beyond which they decreased substantially. Vickers microhardness (Hv) measurements were performed at room temperature to investigate their mechanical performance with various applied loads (0.49–9.80 N) and times (10–90 s). For both substitutions, the mechanical properties were enhanced up to an optimal value at x=0.025. All samples exhibited normal indentation size effect (ISE) behavior. The proportional sample resistance (PSR) model best explained Hv values among five theoretical models. Dislocation creep was the primary creep mechanism in the samples, according to indentation creep studies. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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13 pages, 335 KiB  
Article
Hubbard Bands and Exotic States in Doped and Undoped Mott Systems: The Kotliar–Ruckenstein Representation
by Valentin Yu. Irkhin
Condens. Matter 2023, 8(3), 75; https://doi.org/10.3390/condmat8030075 - 28 Aug 2023
Viewed by 1442
Abstract
The slave–particle representation is a promising method to treat the properties of exotic strongly correlated systems. We develop a unified approach to describe both the paramagnetic state with possible spin–liquid features and states with strong long-range or short-range magnetic order. Combining the Kotliar–Ruckenstein [...] Read more.
The slave–particle representation is a promising method to treat the properties of exotic strongly correlated systems. We develop a unified approach to describe both the paramagnetic state with possible spin–liquid features and states with strong long-range or short-range magnetic order. Combining the Kotliar–Ruckenstein representation and fractionalized spin–liquid deconfinement picture, the Mott transition and Hubbard subbands are considered. The spectrum in the insulating state is significantly affected by the presence of the spinon spin–liquid spectrum and a hidden Fermi surface. Presenting a modification of the Kotliar–Ruckenstein representation in the spin–wave region, we treat the case of magnetic order, with special attention being paid to the half-metallic ferromagnetic state. The formation of small and large Fermi surfaces for doped current carriers in the antiferromagnetic state is also discussed. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
7 pages, 1257 KiB  
Article
Influence of Frustration Effects on the Critical Current of DC SQUID
by Iman N. Askerzade
Condens. Matter 2023, 8(3), 65; https://doi.org/10.3390/condmat8030065 - 28 Jul 2023
Viewed by 1505
Abstract
In this paper, we conducted the calculation of the critical current of DC SQUID based on the Josephson junction on a multi-band superconductor with frustration effect. It is shown that the critical current of DC SQUID on the frustrated multi-band superconductor with a [...] Read more.
In this paper, we conducted the calculation of the critical current of DC SQUID based on the Josephson junction on a multi-band superconductor with frustration effect. It is shown that the critical current of DC SQUID on the frustrated multi-band superconductor with a small geometrical inductance of the loop is determined by the supercurrent amplitude in different channels and by the external magnetic field. In the case of a DC SQUID with high inductance, frustration effects can be ignored. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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Review

Jump to: Research

15 pages, 1288 KiB  
Review
Prospects of Using Fe-Ga Alloys for Magnetostrictive Applications at High Frequencies
by Vasily Milyutin, Radovan Bureš and Maria Fáberová
Condens. Matter 2023, 8(3), 80; https://doi.org/10.3390/condmat8030080 - 8 Sep 2023
Cited by 3 | Viewed by 1793
Abstract
Fe-Ga is a promising magnetostrictive rare-earth free alloy with an attractive combination of useful properties. In this review, we consider this material through the lens of its potential use in magnetostrictive applications at elevated frequencies. The properties of the Fe-Ga alloy are compared [...] Read more.
Fe-Ga is a promising magnetostrictive rare-earth free alloy with an attractive combination of useful properties. In this review, we consider this material through the lens of its potential use in magnetostrictive applications at elevated frequencies. The properties of the Fe-Ga alloy are compared with other popular magnetostrictive alloys. The two different approaches to reducing eddy current losses for such applications in the context of the Fe-Ga alloy, in particular, the fabrication of thin sheets and Fe-Ga/epoxy composites, are discussed. For the first time, the results of more than a decade of research aimed at developing each of these approaches are analyzed and summarized. The features of each approach, as well as the advantages and disadvantages, are outlined. In general, it has been shown that the Fe-Ga alloy is the most promising magnetostrictive material for use at elevated frequencies (up to 100 kHz) compared to analogs. However, for a wide practical application of the alloy, it is still necessary to solve several problems, which are described in this review. Full article
(This article belongs to the Special Issue Selected Papers from the 8th International Conference on Superconductivity and Magnetism (ICSM2023))
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