Special Issue "Advances in Structure and Properties of Heusler Alloys"
A special issue of Materials (ISSN 1996-1944).
Deadline for manuscript submissions: 31 July 2020.
Interests: condensed matter physics; density functional calculations; materials science; magnetism; interfaces; half-metals; Heusler alloys
Heusler compounds are being actively studied because of their multifunctional properties, including half-metallicity, high temperature ferri- and ferromagnetism, shape memory effects, perpendicular magnetic anisotropy in tetragonal structure, and spin gapless semiconductivity. In particular, Heusler materials are being extensively investigated for applications in spin-based electronics (spintronics), one of the most actively developing fields of materials science which has a vast landscape of potential technological applications. The fast development of thin-film technology has resulted in practical implementations, such as magnetic tunnel junctions (MTJ) in the read heads of computer hard disks. A high degree of spin polarization in electron transport (ideally 100%, in which case the material is called half-metallic) is one of the fundamental requirements for electrodes of MTJs. For practical applications, Heusler-type materials are especially attractive, since they typically demonstrate higher Curie temperature compared to most of the other reported half-metals, such as oxides (CrO2 and Fe3O4), manganites (La0.7Sr0.3MnO3), double perovskites (Sr2FeReO6), chalcogenides (EuN), and pyrites (CoS2), among others.
The degree of transport spin polarization could be altered by several mechanisms, including atomic disorder, mechanical strain, temperature, and surface/interface termination in thin-film multilayer geometry. The latter is typically reported to have a detrimental effect on half-metallicity although, in some recent studies, 100% spin-polarized surfaces in Heusler materials have been reported.
This Special Issue focuses on the structural, magnetic, and electronic properties of Heusler alloys, in particular, for application in spin-based electronics. The topics of interest include but are not limited to:
- Structural, magnetic, and electronics properties of Heusler alloys;
- Half-metallicity in Heusler alloys;
- Effect of mechanical strain on the properties of Heusler alloys;
- Effects of atomic disorder on the electronic structure of Heusler alloys;
- Effects of surface/interface termination in thin-film geometry on the electronic structure of Heusler alloys.
Prof. Pavel V. Lukashev
Manuscript Submission Information
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- Heusler alloys