Journal
PHYSICAL REVIEW LETTERS
Volume 118, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.118.067202
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Funding
- U.S. Department of Energy, Office of Science, Basic Energy Science [DE-SC0009390]
- SHINES, an Energy Frontier Research Center from the U.S. Department of Energy, Office of Science, Basic Energy Science [DE-SC0012670]
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Spin Hall magnetoresistance (SMR) has been observed in Pt/NiO/Y3Fe5O12 (YIG) heterostructures with characteristics very different from those in Pt= YIG. This phenomenon indicates that a spin current generated by the spin Hall effect in Pt transmits through the insulating NiO and is reflected from the NiO/YIG interface. The SMR in Pt/NiO/YIG shows a strong temperature dependence dominated by effective spin conductance, due to antiferromagnetic magnons and spin fluctuation. Inverted SMR has been observed below a temperature which increases with the NiO thickness, suggesting a spin-flip reflection from the antiferromagnetic NiO exchange coupled with the YIG.
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