Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure

Abstract Understanding and controlling the interfacial magnetic properties of ferromagnetic thin films are crucial for spintronic device applications. However, using conventional magnetometry, it is difficult to detect them separately from the bulk properties. Here, by utilizing tunneling anisotropi...

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Autores principales:	Le Duc Anh, Noboru Okamoto, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, Shinobu Ohya
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d88a9052cfd04c059a5c21f21d595314
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spelling	oai:doaj.org-article:d88a9052cfd04c059a5c21f21d5953142021-12-02T15:05:43ZHidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure10.1038/s41598-017-09125-02045-2322https://doaj.org/article/d88a9052cfd04c059a5c21f21d5953142017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-09125-0https://doaj.org/toc/2045-2322Abstract Understanding and controlling the interfacial magnetic properties of ferromagnetic thin films are crucial for spintronic device applications. However, using conventional magnetometry, it is difficult to detect them separately from the bulk properties. Here, by utilizing tunneling anisotropic magnetoresistance in a single-barrier heterostructure composed of La0.6Sr0.4MnO3 (LSMO)/LaAlO3 (LAO)/Nb-doped SrTiO3 (001), we reveal the presence of a peculiar strong two-fold magnetic anisotropy (MA) along the [110]c direction at the LSMO/LAO interface, which is not observed in bulk LSMO. This MA shows unknown behavior that the easy magnetization axis rotates by 90° at an energy of 0.2 eV below the Fermi level in LSMO. We attribute this phenomenon to the transition between the e g and t 2g bands at the LSMO interface. Our finding and approach to understanding the energy dependence of the MA demonstrate a new possibility of efficient control of the interfacial magnetic properties by controlling the band structures of oxide heterostructures.Le Duc AnhNoboru OkamotoMunetoshi SekiHitoshi TabataMasaaki TanakaShinobu OhyaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-7 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Le Duc Anh Noboru Okamoto Munetoshi Seki Hitoshi Tabata Masaaki Tanaka Shinobu Ohya Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure
description	Abstract Understanding and controlling the interfacial magnetic properties of ferromagnetic thin films are crucial for spintronic device applications. However, using conventional magnetometry, it is difficult to detect them separately from the bulk properties. Here, by utilizing tunneling anisotropic magnetoresistance in a single-barrier heterostructure composed of La0.6Sr0.4MnO3 (LSMO)/LaAlO3 (LAO)/Nb-doped SrTiO3 (001), we reveal the presence of a peculiar strong two-fold magnetic anisotropy (MA) along the [110]c direction at the LSMO/LAO interface, which is not observed in bulk LSMO. This MA shows unknown behavior that the easy magnetization axis rotates by 90° at an energy of 0.2 eV below the Fermi level in LSMO. We attribute this phenomenon to the transition between the e g and t 2g bands at the LSMO interface. Our finding and approach to understanding the energy dependence of the MA demonstrate a new possibility of efficient control of the interfacial magnetic properties by controlling the band structures of oxide heterostructures.
format	article
author	Le Duc Anh Noboru Okamoto Munetoshi Seki Hitoshi Tabata Masaaki Tanaka Shinobu Ohya
author_facet	Le Duc Anh Noboru Okamoto Munetoshi Seki Hitoshi Tabata Masaaki Tanaka Shinobu Ohya
author_sort	Le Duc Anh
title	Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure
title_short	Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure
title_full	Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure
title_fullStr	Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure
title_full_unstemmed	Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure
title_sort	hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/d88a9052cfd04c059a5c21f21d595314
work_keys_str_mv	AT leducanh hiddenpeculiarmagneticanisotropyattheinterfaceinaferromagneticperovskiteoxideheterostructure AT noboruokamoto hiddenpeculiarmagneticanisotropyattheinterfaceinaferromagneticperovskiteoxideheterostructure AT munetoshiseki hiddenpeculiarmagneticanisotropyattheinterfaceinaferromagneticperovskiteoxideheterostructure AT hitoshitabata hiddenpeculiarmagneticanisotropyattheinterfaceinaferromagneticperovskiteoxideheterostructure AT masaakitanaka hiddenpeculiarmagneticanisotropyattheinterfaceinaferromagneticperovskiteoxideheterostructure AT shinobuohya hiddenpeculiarmagneticanisotropyattheinterfaceinaferromagneticperovskiteoxideheterostructure
_version_	1718388736611319808

Hidden peculiar magnetic anisotropy at the interface in a ferromagnetic perovskite-oxide heterostructure

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