New quaternary half-metallic ferromagnets with large Curie temperatures

Abstract New magnetic materials with high Curie temperatures for spintronic applications are perpetually sought for. In this paper, we present an ab initio study of the structural, electronic and magnetic properties of Quaternary Heusler compounds CoX′Y′Si where X′ is a transition metal with 4d elec...

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Autores principales:	Ashis Kundu, Srikrishna Ghosh, Rudra Banerjee, Subhradip Ghosh, Biplab Sanyal
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/038720c723964999a55648c06df6885e
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spelling	oai:doaj.org-article:038720c723964999a55648c06df6885e2021-12-02T11:41:09ZNew quaternary half-metallic ferromagnets with large Curie temperatures10.1038/s41598-017-01782-52045-2322https://doaj.org/article/038720c723964999a55648c06df6885e2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01782-5https://doaj.org/toc/2045-2322Abstract New magnetic materials with high Curie temperatures for spintronic applications are perpetually sought for. In this paper, we present an ab initio study of the structural, electronic and magnetic properties of Quaternary Heusler compounds CoX′Y′Si where X′ is a transition metal with 4d electrons and Y′ is either Fe or Mn. We find five new half-metallic ferromagnets with spin polarisation nearly 100% with very high Curie temperatures. The variation of Curie temperatures as a function of valence electrons can be understood from the calculated inter-atomic exchange interaction parameters. We also identify a few other compounds, which could be potential half-metals with suitable application of pressure or with controlled doping. Our results reveal that the half-metallicity in these compounds is intricately related to the arrangements of the magnetic atoms in the Heusler lattice and hence, the interatomic exchange interactions between the moments. The trends in the atomic arrangements, total and local magnetic moments, interatomic magnetic exchange interactions and Curie temperatures are discussed with fundamental insights.Ashis KunduSrikrishna GhoshRudra BanerjeeSubhradip GhoshBiplab SanyalNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-15 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ashis Kundu Srikrishna Ghosh Rudra Banerjee Subhradip Ghosh Biplab Sanyal New quaternary half-metallic ferromagnets with large Curie temperatures
description	Abstract New magnetic materials with high Curie temperatures for spintronic applications are perpetually sought for. In this paper, we present an ab initio study of the structural, electronic and magnetic properties of Quaternary Heusler compounds CoX′Y′Si where X′ is a transition metal with 4d electrons and Y′ is either Fe or Mn. We find five new half-metallic ferromagnets with spin polarisation nearly 100% with very high Curie temperatures. The variation of Curie temperatures as a function of valence electrons can be understood from the calculated inter-atomic exchange interaction parameters. We also identify a few other compounds, which could be potential half-metals with suitable application of pressure or with controlled doping. Our results reveal that the half-metallicity in these compounds is intricately related to the arrangements of the magnetic atoms in the Heusler lattice and hence, the interatomic exchange interactions between the moments. The trends in the atomic arrangements, total and local magnetic moments, interatomic magnetic exchange interactions and Curie temperatures are discussed with fundamental insights.
format	article
author	Ashis Kundu Srikrishna Ghosh Rudra Banerjee Subhradip Ghosh Biplab Sanyal
author_facet	Ashis Kundu Srikrishna Ghosh Rudra Banerjee Subhradip Ghosh Biplab Sanyal
author_sort	Ashis Kundu
title	New quaternary half-metallic ferromagnets with large Curie temperatures
title_short	New quaternary half-metallic ferromagnets with large Curie temperatures
title_full	New quaternary half-metallic ferromagnets with large Curie temperatures
title_fullStr	New quaternary half-metallic ferromagnets with large Curie temperatures
title_full_unstemmed	New quaternary half-metallic ferromagnets with large Curie temperatures
title_sort	new quaternary half-metallic ferromagnets with large curie temperatures
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/038720c723964999a55648c06df6885e
work_keys_str_mv	AT ashiskundu newquaternaryhalfmetallicferromagnetswithlargecurietemperatures AT srikrishnaghosh newquaternaryhalfmetallicferromagnetswithlargecurietemperatures AT rudrabanerjee newquaternaryhalfmetallicferromagnetswithlargecurietemperatures AT subhradipghosh newquaternaryhalfmetallicferromagnetswithlargecurietemperatures AT biplabsanyal newquaternaryhalfmetallicferromagnetswithlargecurietemperatures
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New quaternary half-metallic ferromagnets with large Curie temperatures

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