期刊
PHYSICAL REVIEW LETTERS
卷 113, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.113.037203
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资金
- DOE/BES [DE-FG02-07ER46351]
- NSF/ECCS
- DMEA/CNN
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1202559] Funding Source: National Science Foundation
In bilayers consisting of Pd and yttrium iron garnet (Y3Fe5O12 or YIG), we observe vanishingly small room-temperature conventional anisotropic magnetoresistance but large new magnetoresistance that is similar to the spin Hall magnetoresistance previously reported in Pt-YIG bilayers. We report a temperature dependence study of the two magnetoresistance effects in Pt-YIG bilayers. As the temperature is decreased, the new magnetoresistance shows a peak, whereas the anisotropic magnetoresistance effect starts to appear and increases monotonically. We find that the magnetoresistance peak shifts to lower temperatures in thicker Pd samples, a feature characteristic of the spin current effect. The distinct temperature dependence reveals fundamentally different mechanisms responsible for the two effects in such hybrid structures.
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