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Magnetic Materials and Thin Films
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Magnetic Materials and Thin Films

A special issue of Coatings (ISSN 2079-6412). This special issue belongs to the section "Thin Films".

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 12237

Special Issue Editor

Dr. Aurora Diana Rata

E-Mail Website
Guest Editor
Institute of Physics, Martin Luther University Halle-Wittenberg, 06120 Halle, Germany
Interests: thin films growth and structure characterization; heterostructures and interfaces; transition metal oxides; magnetic properties of thin films; magnetoelectric coupling; magnetic anisotropy; spectroscopy and synchrotron radiation

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your work to this Special Issue on "Magnetic Materials and Thin Films". Magnetic materials have dominated a significant part of condensed matter research efforts around the word for several decades. Traditionally, materials hosting 3d orbitals have governed the most attention. Recently, materials with 4d and 5d transition metal ions have started to gain tremendous scientific interest, since exotic quantum phenomena induced by chemical doping or external pressure are theoreticaly predicted. This opens up a new avenue for possible aplicability. Therefore, thin film growth of magnetic materials and studies of fundamental properties, for example, magnetocrystalline anisotropy, are very important for future spintronic applications.

The aim of this Special Issue is to present the latest experimental and theoretical developments in the field of magnetic material and thin films.

In particular, the topics of interest include but are not limited to:

  • Magnetic materials;
  • Thin films and interfaces;
  • Magnetic anisotropy;
  • Magnetoelectric coupling.

Dr. Aurora Diana Rata
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 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. Coatings 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 2600 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

  • magnetic materials
  • thin films
  • ferromagnetism
  • magnetoelectric coupling
  • electron correlations
  • spin–orbit coupling
  • magnetic anisotropy

Published Papers (3 papers)

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Research

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12 pages, 1953 KiB  
Article
Dynamic Reversible Evolution of Wrinkles on Floating Polymer Films under Magnetic Control
by Chenchen Jiang, Xue Han, Juanjuan Wang, Lele Li, Enping Liu and Conghua Lu
Coatings 2021, 11(5), 494; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings11050494 - 23 Apr 2021
Cited by 1 | Viewed by 1952
Abstract
In this paper, we present a simple and versatile method to dynamically and reversibly tailor surface wrinkles on a floating polymer film by combining a magnetic droplet and neodymium magnet. The magnetic force from the attraction of the neodymium magnet to the magnetic [...] Read more.
In this paper, we present a simple and versatile method to dynamically and reversibly tailor surface wrinkles on a floating polymer film by combining a magnetic droplet and neodymium magnet. The magnetic force from the attraction of the neodymium magnet to the magnetic droplet is the main reason for surface instabilities of floating polymer films, which can induce radial stress in the radial direction, and further, compressive stress in the circumferential direction. This compressive stress can trigger not only floating film wrinkling but also a wrinkle-fold transition. Surface morphologies on the floating polymer film have been systematically studied, by varying the distance between the magnetic droplet and neodymium magnet, polymer film thickness, and magnetic droplet volume. With the decrease in the distance between a magnetic droplet and a neodymium magnet, the decrease in polymer film thickness, and the increase in the magnetic droplet volume, the wrinkle numbers increase and even a wrinkle-fold transition happens. Additionally, the coupling effect of multiple magnetic droplets on the floating film has also been used to achieve novel surface wrinkle patterns, which greatly widens the applications of surface wrinkling. Full article
(This article belongs to the Special Issue Magnetic Materials and Thin Films)
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Review

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21 pages, 5835 KiB  
Review
Exchange Bias in Thin Films—An Update
by Tomasz Blachowicz and Andrea Ehrmann
Coatings 2021, 11(2), 122; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings11020122 - 22 Jan 2021
Cited by 51 | Viewed by 5171
Abstract
The exchange bias (EB) is an effect occurring in coupled ferromagnetic/antiferromagnetic materials of diverse shapes, from core–shell nanoparticles to stacked nanostructures and thin films. The interface coupling typically results in a horizontal—often also vertical—shift of the hysteresis loop, combined with an increased coercivity, [...] Read more.
The exchange bias (EB) is an effect occurring in coupled ferromagnetic/antiferromagnetic materials of diverse shapes, from core–shell nanoparticles to stacked nanostructures and thin films. The interface coupling typically results in a horizontal—often also vertical—shift of the hysteresis loop, combined with an increased coercivity, as compared to the pure ferromagnet, and the possibility of asymmetric hysteresis loops. Several models have been developed since its discovery in 1956 which still have some drawbacks and some unexplained points, while exchange bias systems are at the same time being used in hard drive read heads and are part of highly important elements for spintronics applications. Here, we give an update of new theoretical models and experimental findings regarding exchange bias phenomena in thin films during the last years, including new material combinations in which an exchange bias was found. Full article
(This article belongs to the Special Issue Magnetic Materials and Thin Films)
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19 pages, 4004 KiB  
Review
Magnetoelectric Coupling in Bismuth Ferrite—Challenges and Perspectives
by Srihari N. V., K. B. Vinayakumar and K. K. Nagaraja
Coatings 2020, 10(12), 1221; https://0-doi-org.brum.beds.ac.uk/10.3390/coatings10121221 - 14 Dec 2020
Cited by 33 | Viewed by 4423
Abstract
Multiferroic materials belong to the sub-group of ferroics possessing two or more ferroic orders in the same phase. Aizu first coined the term multiferroics in 1969. Of late, several multiferroic materials’ unique and robust characteristics have shown great potential for various applications. Notably, [...] Read more.
Multiferroic materials belong to the sub-group of ferroics possessing two or more ferroic orders in the same phase. Aizu first coined the term multiferroics in 1969. Of late, several multiferroic materials’ unique and robust characteristics have shown great potential for various applications. Notably, the coexisting magnetic and electrical ordering results in the Magnetoelectric effect (ME), wherein the electrical polarization can be manipulated by magnetic fields and magnetization by electric fields. Currently, more significant interests lie in significantly enhancing the ME coupling facilitating the realization of Spintronic devices, which makes use of the transport phenomenon of spin-polarized electrons. On the other hand, the magnetoelectric coupling is also pivotal in magnetic memory devices wherein the application of small electric voltage manipulates the magnetic properties of the device. This review gives a brief overview of magnetoelectric coupling in Bismuth ferrite and approaches to achieve higher magnetoelectric coupling and device applications. Full article
(This article belongs to the Special Issue Magnetic Materials and Thin Films)
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