Understanding complex multiple sublattice magnetism in double double perovskites

Abstract Understanding magnetism in multiple magnetic sublattice system, driven by the interplay of varied nature of magnetic exchanges, is on one hand challenging and on other hand intriguing. Motivated by the recent synthesis of AA $$^{\prime }$$ ′ BB $$^{\prime }$$ ′ O $$_6$$ 6 double double pero...

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Autores principales:	Anita Halder, Shreya Das, Prabuddha Sanyal, Tanusri Saha-Dasgupta
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3be2b00f375f4bb596d3f1961fd5b9b7
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spelling	oai:doaj.org-article:3be2b00f375f4bb596d3f1961fd5b9b72021-11-08T10:55:44ZUnderstanding complex multiple sublattice magnetism in double double perovskites10.1038/s41598-021-00959-32045-2322https://doaj.org/article/3be2b00f375f4bb596d3f1961fd5b9b72021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-00959-3https://doaj.org/toc/2045-2322Abstract Understanding magnetism in multiple magnetic sublattice system, driven by the interplay of varied nature of magnetic exchanges, is on one hand challenging and on other hand intriguing. Motivated by the recent synthesis of AA $$^{\prime }$$ ′ BB $$^{\prime }$$ ′ O $$_6$$ 6 double double perovskites with multiple magnetic ions both at A- and B-sites, we investigate the mechanism of magnetic behavior in these interesting class of compounds. We find that the magnetism in such multiple sublattice compounds is governed by the interplay and delicate balance between two distinct mechanisms, (a) kinetic energy-driven multiple sublattice double exchange mechanism and (b) the conventional super-exchange mechanism. The derived spin Hamiltonian based on first-principles calculations is solved by classical Monte Carlo technique which reproduces the observed magnetic properties. Finally, the influence of off-stoichiometry, as in experimental samples, is discussed. Some of these double double perovskite compounds are found to possess large total magnetic moment and also are found to be half-metallic with reasonably high transition temperature, which raises the hope of future applications of these large magnetic moment half-metallic oxides in spintronics and memory devices.Anita HalderShreya DasPrabuddha SanyalTanusri Saha-DasguptaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Anita Halder Shreya Das Prabuddha Sanyal Tanusri Saha-Dasgupta Understanding complex multiple sublattice magnetism in double double perovskites
description	Abstract Understanding magnetism in multiple magnetic sublattice system, driven by the interplay of varied nature of magnetic exchanges, is on one hand challenging and on other hand intriguing. Motivated by the recent synthesis of AA $$^{\prime }$$ ′ BB $$^{\prime }$$ ′ O $$_6$$ 6 double double perovskites with multiple magnetic ions both at A- and B-sites, we investigate the mechanism of magnetic behavior in these interesting class of compounds. We find that the magnetism in such multiple sublattice compounds is governed by the interplay and delicate balance between two distinct mechanisms, (a) kinetic energy-driven multiple sublattice double exchange mechanism and (b) the conventional super-exchange mechanism. The derived spin Hamiltonian based on first-principles calculations is solved by classical Monte Carlo technique which reproduces the observed magnetic properties. Finally, the influence of off-stoichiometry, as in experimental samples, is discussed. Some of these double double perovskite compounds are found to possess large total magnetic moment and also are found to be half-metallic with reasonably high transition temperature, which raises the hope of future applications of these large magnetic moment half-metallic oxides in spintronics and memory devices.
format	article
author	Anita Halder Shreya Das Prabuddha Sanyal Tanusri Saha-Dasgupta
author_facet	Anita Halder Shreya Das Prabuddha Sanyal Tanusri Saha-Dasgupta
author_sort	Anita Halder
title	Understanding complex multiple sublattice magnetism in double double perovskites
title_short	Understanding complex multiple sublattice magnetism in double double perovskites
title_full	Understanding complex multiple sublattice magnetism in double double perovskites
title_fullStr	Understanding complex multiple sublattice magnetism in double double perovskites
title_full_unstemmed	Understanding complex multiple sublattice magnetism in double double perovskites
title_sort	understanding complex multiple sublattice magnetism in double double perovskites
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/3be2b00f375f4bb596d3f1961fd5b9b7
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_version_	1718442513847549952

Understanding complex multiple sublattice magnetism in double double perovskites

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