Spin transport in antiferromagnetic NiO and magnetoresistance in Y3Fe5O12/NiO/Pt structures

Hung, Yu-Ming; Hahn, Christian; Chang, Houchen; Wu, Mingzhong; Ohldag, Hendrik; Kent, Andrew D.

doi:10.1063/1.4972998

Title: Spin transport in antiferromagnetic NiO and magnetoresistance in Y3Fe5O12/NiO/Pt structures

Journal Article · Thu Dec 22 00:00:00 EST 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4972998· OSTI ID:1337435

^[1]; Hahn, Christian ^[1];

^[2]; Wu, Mingzhong ^[2]; Ohldag, Hendrik ^[3]; Kent, Andrew D. ^[1]

Department of Physics, New York University, New York, New York 10003, USA
Department of Physics, Colorado State University, Fort Collins, Colorado 80523, USA
Stanford Synchrotron Radiation Lightsource, Menlo Park, California 94025, USA

Here, we have studied spin transport and magnetoresistance in yttrium iron garnet (YIG)/NiO/Pt trilayers with varied NiO thickness. To characterize the spin transport through NiO we excite ferromagnetic resonance in YIG with a microwave frequency magnetic field and detect the voltage associated with the inverse spin-Hall effect (ISHE) in the Pt layer. The ISHE signal is found to decay exponentially with the NiO thickness with a characteristic decay length of 3.9 nm. This is contrasted with the magnetoresistance in these same structures. The symmetry of the magnetoresistive response is consistent with spin-Hall magnetoresistance (SMR). However, in contrast to the ISHE response, as the NiO thickness increases the SMR signal goes towards zero abruptly at a NiO thickness of ≃ 4 nm, highlighting the different length scales associated with the spin-transport in NiO and SMR in such trilayers.

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Research Organization:: New York Univ. (NYU), NY (United States); Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012670

OSTI ID:: 1337435

Alternate ID(s):: OSTI ID: 1393525; OSTI ID: 1421315

Journal Information:: AIP Advances, Journal Name: AIP Advances Vol. 7 Journal Issue: 5; ISSN 2158-3226

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 24 works

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