Special Issue "Multiferroics Crystals"

A special issue of Crystals (ISSN 2073-4352).

Deadline for manuscript submissions: closed (31 January 2017)

Special Issue Editor

Guest Editor
Prof. Dr. Iwan Kityk

Department of Electrical Engineering, Czestochowa Univeristy Technology, PL-42201, Armii Krajoej 17, Czestochowa, Poland
Website | E-Mail
Interests: nonlinear optical crystals and nanocrystals; laser stimulated effects in crystals; nanophotonic and optoelecronic crystals

Special Issue Information

Dear Colleagues,

Multiferroics crystals are very promising for different applications in electronics, spintronics, magnetical sensors, and optical memory devices. Due to coexistence of spontaneous polarization and magnetizations, they possess a high degree of magnetoelectric coupling. The latter favors substantial enhancement of the principal magnetical, dielectric and optical constants in the vicinity of the corresponding phase transactions. Particular interest presents itself in the study of low-dimensional multiferroics crystals in the form of nanocrystals and oriented nanocrysatlline films. The anomalies in the vicinity of the phase transitions may be used for their applications as thermo and piezo-sensors. The fundamental aspects of the ferromagnetic and ferromagnetic transitions are of exceptional interest, both from fundamental, as well as application points of view.

The mentioned properties may be applied for the production of magnetometers, multi-field (electrical, mechanical magnetical, temperature) sensors, and thermally-regulated capacitors.

All the multiferroics crystals and their features are very sensitive to the presence of defects, voids, and other imperfections. As a consequence, an improvement of the corresponding technology is a crucial directions of research. At the same time, applying external fields (laser, electromagnetic, etc.) allow to vary their properties in desired directions.

We kindly invite you to send manuscripts devoted to novel growth and fabrication of high performance multiferroics crystallites in a form of bulk, nanocrystallites, nanoceramics, and nanocrystalline films. These compounds include, but are not limited to: RMnO3, Lu2CoMnO6, BiFeO3, Bi2Fe4O9, FeVO4 and corresponding dopants and alloys.

Among the possible topics to include:

  • Synthesis of multiferroics compounds, including the modeling of compound synthesis.
  • Examination of (magnetic, magnetoelecrical, optical, dielectric , nonlinear optical features, etc.) both for pure and doped compounds.
  • Progress and design in further fabrication of multiferroics compounds for spintronics and optoelectronics
  • Fundamental studies of the band structure for the multiferroics.
  • Influence of doping on the multiferroics features
  • Low-dimensional manifestation of the optical and electrical effects in the multiferroics.
  • Exploration of the multiferroic surfaces.
  • Aging processes in multiferroics.
  • Multiferroics applications as sensors and actuators.

Prof. Dr. Iwan Kityk
Guest Editor

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 papers will be 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. Crystals is an international peer-reviewed open access monthly 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 1000 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

  • Multiferroic crystals
  • Magneto-electrical properties
  • Magnetic nanocrystallites
  • Sensors
  • Ferrolectric properties
  • Sensors
  • Actuators
  • Spintronics

Published Papers (5 papers)

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Research

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Open AccessArticle The Influence of Conductive Nanodomain Walls on the Photovoltaic Effect of BiFeO3 Thin Films
Crystals 2017, 7(3), 81; doi:10.3390/cryst7030081
Received: 30 January 2017 / Revised: 26 February 2017 / Accepted: 6 March 2017 / Published: 21 March 2017
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Abstract
Two Planar Pt electrodes with an inter-electrode distance of about 100 nm were fabricated at the surface of BiFeO3 thin films, which allow the manipulation of ferroelectric domain switching at nanoscale. This electrode configuration was pursued to study conductive domain-wall influence on
[...] Read more.
Two Planar Pt electrodes with an inter-electrode distance of about 100 nm were fabricated at the surface of BiFeO3 thin films, which allow the manipulation of ferroelectric domain switching at nanoscale. This electrode configuration was pursued to study conductive domain-wall influence on the photovoltaic current in BiFeO3 thin films. Modulations of short-circuit photovoltaic current and hysteretic conductive switching behaviors were found in the above nanodevices, accompanied by the generation of the conductive domain walls connecting two gapped electrodes. Our technique provides a new method to configure ferroelectric domains, where the influence of the conductive domain walls on the photovoltaic effect is preeminent. Full article
(This article belongs to the Special Issue Multiferroics Crystals)
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Open AccessArticle Cobalt-Substituted Seven-Layer Aurivillius Bi8Fe4Ti3O24 Ceramics: Enhanced Ferromagnetism and Ferroelectricity
Crystals 2017, 7(3), 76; doi:10.3390/cryst7030076
Received: 12 January 2017 / Revised: 28 February 2017 / Accepted: 1 March 2017 / Published: 8 March 2017
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Abstract
In this work, Aurivillius-phase Bi8Fe4-xCoxTi3O24 (7-BFCT, 0 ≤ x ≤ 0.4) powders and ceramics were successfully prepared by the combination of citrate combustion and hot-press methods. X-ray diffraction (XRD) and high-resolution transmission electron
[...] Read more.
In this work, Aurivillius-phase Bi8Fe4-xCoxTi3O24 (7-BFCT, 0 ≤ x ≤ 0.4) powders and ceramics were successfully prepared by the combination of citrate combustion and hot-press methods. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) indicate a successful synthesis of the pure phase of the 7-BFCT ceramics, and all the samples showed a good seven-layer structure of the Aurivillius phase. Partial Fe substituted by Co was found to be effective to enhance both ferromagnetic and ferroelectric properties at room temperature, and the largest remnant magnetization (2Mr) of ~0.69 emu/g was revealed at the composition of x = 0.4. Zero field cooling and field cooling (ZFC-FC) magnetization measurement confirmed its magnetic transition occurring at a high temperature of ~750 K. Correspondingly, the enhanced ferroelectric properties of such Co-substituted ceramics were also investigated. Full article
(This article belongs to the Special Issue Multiferroics Crystals)
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Open AccessArticle Single Crystal Growth of Multiferroic Double Perovskites: Yb2CoMnO6 and Lu2CoMnO6
Crystals 2017, 7(3), 67; doi:10.3390/cryst7030067
Received: 29 January 2017 / Revised: 24 February 2017 / Accepted: 24 February 2017 / Published: 27 February 2017
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Abstract
We report on the growth of multiferroic Yb2CoMnO6 and Lu2CoMnO6 single crystals which were synthesized by the flux method with Bi2O3. Yb2CoMnO6 and Lu2CoMnO6 crystallize in a
[...] Read more.
We report on the growth of multiferroic Yb2CoMnO6 and Lu2CoMnO6 single crystals which were synthesized by the flux method with Bi2O3. Yb2CoMnO6 and Lu2CoMnO6 crystallize in a double-perovskite structure with a monoclinic P21/n space group. Bulk magnetization measurements of both specimens revealed strong magnetic anisotropy and metamagnetic transitions. We observed a dielectric anomaly perpendicular to the c axis. The strongly coupled magnetic and dielectric states resulted in the variation of both the dielectric constant and the magnetization by applying magnetic fields, offering an efficient approach to accomplish intrinsically coupled functionality in multiferroics. Full article
(This article belongs to the Special Issue Multiferroics Crystals)
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Review

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Open AccessReview Review of the Magnetocaloric Effect in RMnO3 and RMn2O5 Multiferroic Crystals
Crystals 2017, 7(2), 44; doi:10.3390/cryst7020044
Received: 23 December 2016 / Accepted: 4 February 2017 / Published: 8 February 2017
Cited by 4 | PDF Full-text (3369 KB) | HTML Full-text | XML Full-text
Abstract
It is known that some of RMnO3 and RMn2O5 (R = rare earth) multiferroic crystals reveal a strong interplay between their magnetic and electric order parameters, paving the way for applications in spintronic technologies. Additionally, recent works have also pointed out their potential
[...] Read more.
It is known that some of RMnO3 and RMn2O5 (R = rare earth) multiferroic crystals reveal a strong interplay between their magnetic and electric order parameters, paving the way for applications in spintronic technologies. Additionally, recent works have also pointed out their potential utilization as refrigerants in magnetocaloric cooling systems for cryogenic tasks. In this paper, recent advances regarding the magnetocaloric properties of both RMnO3 and RMn2O5 families of multiferroics are reviewed. With the aim of understanding the RMnO3 and RMn2O5 magnetocaloric features, their structural and magnetic properties are discussed. The physics behind the magnetocaloric effect as well as some of its key thermodynamic aspects are also considered. Full article
(This article belongs to the Special Issue Multiferroics Crystals)
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Open AccessReview Ferroelastic Domain Boundary-Based Multiferroicity
Crystals 2016, 6(12), 163; doi:10.3390/cryst6120163
Received: 16 September 2016 / Revised: 17 November 2016 / Accepted: 3 December 2016 / Published: 9 December 2016
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Abstract
Domain boundary engineering endeavors to develop materials that contain localized functionalities inside domain walls, which do not exist in the bulk. Here we review multiferroic devices that are based on ferroelectricity inside ferroelastic domain boundaries. The discovery of polarity in CaTiO3 and
[...] Read more.
Domain boundary engineering endeavors to develop materials that contain localized functionalities inside domain walls, which do not exist in the bulk. Here we review multiferroic devices that are based on ferroelectricity inside ferroelastic domain boundaries. The discovery of polarity in CaTiO3 and SrTiO3 leads to new directions to produce complex domain patterns as templates for ferroic devices. Full article
(This article belongs to the Special Issue Multiferroics Crystals)
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