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Dong, B.-W.*; Baldrati, L.*; Schneider, C.*; 新関 友彦*; Ramos, R.*; Ross, A.*; Cramer, J.*; 齊藤 英治; Klui, M.*
Applied Physics Letters, 114(10), p.102405_1 - 102405_5, 2019/03
被引用回数:12 パーセンタイル:50.92(Physics, Applied)We study the spin Hall magnetoresistance (SMR) in epitaxial -Fe
O
/NiO(001)/Pt stacks, as a function of temperature and thickness of the antiferromagnetic insulating NiO layer. Upon increasing the thickness of NiO from 0 nm to 10 nm, we detect a sign change of the SMR in the temperature range between 10 K and 280 K. This temperature dependence of the SMR in our stacks is different compared to that of previously studied yttrium iron garnet/NiO/Pt, as we do not find any peak or sign change as a function of temperature. We explain our data by a combination of spin current reflection from both the NiO/Pt and
-Fe
O
/NiO interfaces and the thickness-dependent exchange coupling mode between the NiO and
-Fe
O
layers, comprising parallel alignment for thin NiO and perpendicular alignment for thick NiO.