Artificially engineered Heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy

To extend density limits in magnetic recording industry, two separate strategies were developed to build the storage bit in last decade, introduction of perpendicular magnetic anisotropy (PMA) and adoption of ferrimagnetism/antiferromagnetism. Meanwhile, these properties significantly improve device...

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Main Authors:	Ma, Q. L., Zhang, X. M., Miyazaki, T., Mizukami, S.
Format:	Online
Language:	English
Published:	Nature Publishing Group 2015
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4297959/

id	pubmed-4297959
recordtype	oai_dc
spelling	pubmed-42979592015-01-26 Artificially engineered Heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy Ma, Q. L. Zhang, X. M. Miyazaki, T. Mizukami, S. Article To extend density limits in magnetic recording industry, two separate strategies were developed to build the storage bit in last decade, introduction of perpendicular magnetic anisotropy (PMA) and adoption of ferrimagnetism/antiferromagnetism. Meanwhile, these properties significantly improve device performance, such as reducing spin-transfer torque energy consumption and decreasing signal-amplitude-loss. However, materials combining PMA and antiferromagnetism rather than transition-metal/rare-earth system were rarely developed. Here, we develop a new type of ferrimagnetic superlattice exhibiting PMA based on abundant Heusler alloy families. The superlattice is formed by [MnGa/Co2FeAl] unit with their magnetizations antiparallel aligned. The effective anisotropy (Kueff) over 6 Merg/cm3 is obtained, and the SL can be easily built on various substrates with flexible lattice constants. The coercive force, saturation magnetization and Kueff of SLs are highly controllable by varying the thickness of MnGa and Co2FeAl layers. The SLs will supply a new choice for magnetic recording and spintronics memory application such as magnetic random access memory. Nature Publishing Group 2015-01-19 /pmc/articles/PMC4297959/ /pubmed/25597496 http://dx.doi.org/10.1038/srep07863 Text en Copyright © 2015, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Ma, Q. L. Zhang, X. M. Miyazaki, T. Mizukami, S.
spellingShingle	Ma, Q. L. Zhang, X. M. Miyazaki, T. Mizukami, S. Artificially engineered Heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy
author_facet	Ma, Q. L. Zhang, X. M. Miyazaki, T. Mizukami, S.
author_sort	Ma, Q. L.
title	Artificially engineered Heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy
title_short	Artificially engineered Heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy
title_full	Artificially engineered Heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy
title_fullStr	Artificially engineered Heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy
title_full_unstemmed	Artificially engineered Heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy
title_sort	artificially engineered heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy
description	To extend density limits in magnetic recording industry, two separate strategies were developed to build the storage bit in last decade, introduction of perpendicular magnetic anisotropy (PMA) and adoption of ferrimagnetism/antiferromagnetism. Meanwhile, these properties significantly improve device performance, such as reducing spin-transfer torque energy consumption and decreasing signal-amplitude-loss. However, materials combining PMA and antiferromagnetism rather than transition-metal/rare-earth system were rarely developed. Here, we develop a new type of ferrimagnetic superlattice exhibiting PMA based on abundant Heusler alloy families. The superlattice is formed by [MnGa/Co2FeAl] unit with their magnetizations antiparallel aligned. The effective anisotropy (Kueff) over 6 Merg/cm3 is obtained, and the SL can be easily built on various substrates with flexible lattice constants. The coercive force, saturation magnetization and Kueff of SLs are highly controllable by varying the thickness of MnGa and Co2FeAl layers. The SLs will supply a new choice for magnetic recording and spintronics memory application such as magnetic random access memory.
publisher	Nature Publishing Group
publishDate	2015
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4297959/
_version_	1613177856093847552

Artificially engineered Heusler ferrimagnetic superlattice exhibiting perpendicular magnetic anisotropy

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