Special Issue "Magnetic Nanomaterials"

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Advanced Nanomaterials and Nanotechnology".

Deadline for manuscript submissions: 31 January 2020.

Special Issue Editor

Dr. Lucia Del Bianco
E-Mail Website
Guest Editor
Dipartimento di Fisica e Scienze della Terra, Università di Ferrara, I- 44122 Ferrara, Italy
Tel. +39 0532 974225
Interests: study of the magnetic behavior of nanostructured systems (nanocomposite materials and nanocrystalline alloys, nanoparticles, thin films and multilayers, nanopatterned structures) and of the relationship with the structural properties; finite-size effects (magnetic configuration, magnetization process, thermal stability and superparamagnetism); effects originating from the exchange interaction at the interface between different magnetic phases; disordered magnetism; magnetic heating; magnetotransport properties; magnetoelasticity

Special Issue Information

Dear Colleagues,

At present, the constant search for innovative magnetic materials is increasingly leading to the creation of highly engineered systems, built in different forms (films, dot arrays, nanoparticles, nanocrystalline alloys, etc.), structured on a nanometric scale in at least one spatial direction and often characterized by the coexistence of two or more phases, which are magnetically and/or structurally different. 

The possible coincidence, at the nanoscale, of the typical size of the system with critical magnetic lengths ruling specific magnetic phenomena (for instance, the exchange length, below which a ferromagnetic element becomes single-domain, or the exchange correlation length, corresponding to the domain wall thickness) may cause the appearance of novel and amazing magnetic effects. Moreover, the magnetic behavior of nanomaterials can depend crucially on the structure and morphology of the constituent elements and on the type and strength of the magnetic interactions between them. Indeed, the study of the magnetic behavior of nanomaterials has not stopped attracting increasing interest because of their intriguing fundamental properties and prospective applications.

In this last respect, magnetic nanomaterials are already successfully employed or have the potential to play a key role in an extremely wide range of technologically advanced sectors: Energy, electric power technology, communications, spintronics, data storage, sensors, refrigeration, biotechnology, pharmacology, nanomedicine, and environmental protection.

This Special Issue is open to articles (reviews or original manuscripts) dealing with every aspect related to the creation and study, both experimental and theoretical, of magnetic nanomaterials. Particularly welcome are research works on innovative magnetic nanomaterials studied through an interdisciplinary approach and/or intended to be used in an interdisciplinary context.

Dr. Lucia Del Bianco
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. Materials is an international peer-reviewed open access semimonthly 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 2000 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

  • Thin films and multilayers
  • Dots and nanopatterned structures
  • Nanoparticles and ferrofluids
  • Nanocomposites and nanoalloys
  • Hybrid (bio)-materials
  • Biomimetic systems

Published Papers (2 papers)

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Research

Open AccessFeature PaperArticle
Temperature Dependence of the Magnetic Properties of IrMn/CoFeB/Ru/CoFeB Exchange Biased Synthetic Antiferromagnets
Materials 2020, 13(2), 387; https://doi.org/10.3390/ma13020387 - 14 Jan 2020
Abstract
Synthetic antiferromagnets (SAF) are widely used for a plethora of applications among which data storage, computing, and in the emerging field of magnonics. In this framework, controlling the magnetic properties of SAFs via localized thermal treatments represents a promising route for building novel [...] Read more.
Synthetic antiferromagnets (SAF) are widely used for a plethora of applications among which data storage, computing, and in the emerging field of magnonics. In this framework, controlling the magnetic properties of SAFs via localized thermal treatments represents a promising route for building novel magnonic materials. In this paper, we study via vibration sample magnetometry the temperature dependence of the magnetic properties of sputtered exchange bias SAFs grown via magnetron sputtering varying the ferromagnetic layers and spacer thickness. Interestingly, we observe a strong, reversible modulation of the exchange field, saturation field, and coupling strength upon heating up to 250 °C. These results suggest that exchange bias SAFs represent promising systems for developing novel artificial magnetic nanomaterials via localized thermal treatment. Full article
(This article belongs to the Special Issue Magnetic Nanomaterials)
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Open AccessArticle
Glassy Magnetic Behavior and Correlation Length in Nanogranular Fe-Oxide and Au/Fe-Oxide Samples
Materials 2019, 12(23), 3958; https://doi.org/10.3390/ma12233958 - 29 Nov 2019
Abstract
In nanoscale magnetic systems, the possible coexistence of structural disorder and competing magnetic interactions may determine the appearance of a glassy magnetic behavior, implying the onset of a low-temperature disordered collective state of frozen magnetic moments. This phenomenology is the object of an [...] Read more.
In nanoscale magnetic systems, the possible coexistence of structural disorder and competing magnetic interactions may determine the appearance of a glassy magnetic behavior, implying the onset of a low-temperature disordered collective state of frozen magnetic moments. This phenomenology is the object of an intense research activity, stimulated by a fundamental scientific interest and by the need to clarify how disordered magnetism effects may affect the performance of magnetic devices (e.g., sensors and data storage media). We report the results of a magnetic study that aims to broaden the basic knowledge of glassy magnetic systems and concerns the comparison between two samples, prepared by a polyol method. The first can be described as a nanogranular spinel Fe-oxide phase composed of ultrafine nanocrystallites (size of the order of 1 nm); in the second, the Fe-oxide phase incorporated non-magnetic Au nanoparticles (10–20 nm in size). In both samples, the Fe-oxide phase exhibits a glassy magnetic behavior and the nanocrystallite moments undergo a very similar freezing process. However, in the frozen regime, the Au/Fe-oxide composite sample is magnetically softer. This effect is explained by considering that the Au nanoparticles constitute physical constraints that limit the length of magnetic correlation between the frozen Fe-oxide moments. Full article
(This article belongs to the Special Issue Magnetic Nanomaterials)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Nanoporous FePd thin films for magnetic application
Authors: Paola Tiberto; Paola Rizzi; Matteo Cialone; Federico Scaglione; Gabriele Barrera; Federica Celegato; Marco Coisson
Affiliation: 1 Chemistry department, Università di Torino 2 Advanced materials and life science Dept, INRIM, Torino

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