Journal
AIP ADVANCES
Volume 7, Issue 5, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4972998
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Funding
- SHINES, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, Basic Energy Sciences [SC0012670]
- Institute for Nanoelectronics Discovery and Exploration (INDEX)
- NERC
- NIST
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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 similar or equal to 4 nm, highlighting the different length scales associated with the spin-transport in NiO and SMR in such trilayers. (C) 2016 Author(s).
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