Xiao, John Q.
KAUST DepartmentPhysical Sciences and Engineering (PSE) Division
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AbstractWe investigated current driven spin-orbit torques in Cu40Au60/Ni80Fe20/Ti layered structures with in-plane magnetization. We have demonstrated a reliable and convenient method to separate dampinglike torque and fieldlike torque by using the second harmonic technique. It is found that the dampinglike torque and fieldlike torque depend on temperature very differently. Dampinglike torque increases with temperature, while fieldlike torque decreases with temperature, which are different from results obtained previously in other material systems. We observed a nearly linear dependence between the spin Hall angle and longitudinal resistivity, suggesting that skew scattering may be the dominant mechanism of spin-orbit torques.
CitationWen Y, Wu J, Li P, Zhang Q, Zhao Y, et al. (2017) Temperature dependence of spin-orbit torques in Cu-Au alloys. Physical Review B 95. Available: http://dx.doi.org/10.1103/PhysRevB.95.104403.
SponsorsThe research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST) under Grant No. CRF 2015 2626 CRG4. The work at the University of Delaware was supported by the US National Science Foundation under Division of Materials Research Grant No. 1505192.
PublisherAmerican Physical Society (APS)
JournalPhysical Review B