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https://hdl.handle.net/2115/78652

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

英語

2020-01-01

American Institute of Physics (AIP)

AIP Advances

10(1)

015129

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.

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