Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4890239
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Funding
- National Science Foundation of China [11374227, 51331004, 51171129, 51201114]
- Shanghai Committee [0252nm004, 13XD1403700, 13520722700]
- National Science Council of Taiwan
- DOE-BES [DE-FG02-05ER46237]
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We report that anisotropic magnetoresistance (AMR) and anomalous Hall conductivity (AHC) in the Pd1-xPtx/Y3Fe5O12 (YIG) bilayers could be tuned by varying the Pt concentration (x) and also temperature (T). In particular, the AHC at low T changes its sign when x increases from 0 to 1, agreeing with the negative and positive AHC predicted by our ab initio calculations for the magnetic proximity (MP)-induced ferromagnetic Pd and Pt, respectively. The AMR ratio is enhanced by ten times when x increases from 0 to 1. Furthermore, the AMR of PdPt/YIG bilayers shows similar T-dependence as the magnetic susceptibility of the corresponding bulk Pd/Pt, also indicating the MP effect as the origin of the AMR. The present work demonstrates that the alloying of Pt and Pd not only offers tunable spin-orbit coupling but also is useful to reveal the nature of the AMR and AHC in Pt/YIG bilayers, which are useful for spintronics applications. (C) 2014 AIP Publishing LLC.
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