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Current-induced effective magnetic field in La0.67Sr0.33MnO3/LaAlO3/SrTiO3 structures

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Title: Current-induced effective magnetic field in La0.67Sr0.33MnO3/LaAlO3/SrTiO3 structures
Authors: Yamanouchi, Michihiko Browse this author →KAKEN DB
Oyamada, Tatsuro Browse this author
Ohta, Hiromichi Browse this author →KAKEN DB
Issue Date: 1-Jan-2020
Publisher: American Institute of Physics (AIP)
Journal Title: AIP Advances
Volume: 10
Issue: 1
Start Page: 015129
Publisher DOI: 10.1063/1.5129283
Abstract: We investigate the current-induced effective magnetic field H-eff in La0.67Sr0.33MnO3 (18)/LaAlO3(0,2,6)/SrTiO3 (LSMO/LAO/STO) structures by using the planar Hall effect (PHE), where numbers in parentheses give the nominal thickness of the given layer in unit cells. In all the structures, applying an in-plane current creates an in-plane H-eff orthogonal to the current direction, and the direction of H-eff for the LSMO/LAO(6)/STO structure is opposite to that for the LSMO/LAO(0,2)/STO structures. At low temperature, the sign of the PHE coefficient originating from the spin-orbit interaction (SOI) for the LSMO/LAO(6)/STO structure is also opposite to that for the LSMO/LAO(0,2)/STO structures, which suggests that the SOI in the LSMO layer is modified by the LAO(6)/STO structure. The direction of H-eff is consistent with that induced by the SOI at the interface of the LSMO layer, and thus the opposite-polarity H-eff detected in the LSMO/LAO(6)/STO structure can be related to the SOI variation induced by the LAO(6)/STO structure.
Rights: Copyright 2020 Author(s). This article is distributed under a Creative Commons Attribution (CC BY) License.
Type: article
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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