期刊
APPLIED PHYSICS LETTERS
卷 109, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4959958
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资金
- National Research Foundation (NRF), Prime Minister's Office, Singapore [NRF CRP12-2013-01]
The spin orbit torques (SOTs) in perpendicularly magnetized Co-Ni multilayers sandwiched between two heavy metals (HM) have been studied. By exploring various HM materials, we show an efficient enhancement or cancellation of the total SOT, depending on the combination of the two HM materials. The maximum SOT effective field is obtained in Pt/Co-Ni/W heterostructures. We also model our double HM system and show that the effective spin Hall angle has a peak value at certain HM thicknesses. Measuring the SOT in Pt/Co-Ni/W for various W thicknesses confirms an effective spin Hall angle up to 0.45 in our double HM system. Published by AIP Publishing.
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