Tuning of the spin pumping in yttrium iron garnet/Au bilayer system by fast thermal treatment
In this letter, we investigated the influence of the fast thermal treatment on the spin pumping in ferromagnetic insulator yttrium iron garnet (YIG)/normal metal Au bilayer system.The YIG/Au bilayer thin films were treated by fast annealing process with different temperatures from 0 to 800 ℃.The spin pumping was studied using ferromagnetic resonance.The surface evolution was investigated using a high resolution scanning microscopy and an atomic force microscopy.A strong thermal related spin pumping in YIG/Au bilayer system has been revealed.It was found that the spin pumping process can be enhanced by using fast thermal treatment due to the thermal modifications of the Au surface.The effective spin-mixing conductance of the fast thermal treated YIG/Au bilayer has been obtained.For the annealing temperature above 700 ℃, typical Au nano-particles appeared.These Au nano-particles induced a surface anisotropy in YIG/Au interface.
Spin Current Yttrium Iron Garnet Thermal Treatment Spin Mixing Conductance
Lichuan Jin Dainan Zhang Huaiwu Zhang Qinghui Yang Xiaoli Tang Zhiyong Zhong John Q.Xiao
State Key Laboratory of Electronic Thin Films and Integrated Devices,University of Electronic Scienc Department of Electrical and Computer Engineering,University of Delaware,Newark,Delaware 19716,USA Department of Physics and Astronomy,University of Delaware,Newark,Delaware 19716,USA
国内会议
成都
英文
239-244
2013-11-15（万方平台首次上网日期，不代表论文的发表时间）