Variation of effective damping with temperature in permalloy/Gd heterostructures
Variation of effective damping with temperature in permalloy/Gd heterostructures
复制标题
坡莫合金/Gd 异质结构中有效阻尼随温度的变化
DOI：
10.1103/physrevb.102.174439
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发表时间：
2020-11
影响因子：
3.7
通讯作者：
Xue Desheng
中科院分区：
文献类型：
--
作者：
Zhang Peng;Li Shuangfeng;Yao Jiguang;Zhang Hanwen;Feng Xiaoyu;Zhang Qihan;Cao Jiangwei;Fan Xiaolong;Xue Desheng
In this study, we systematically investigate the temperature dependence of effective damping in FeNi (permalloy or Py)/Gd bilayer based on broadband ferromagnetic resonance. Despite a significant increase in the effective damping of the Py/Gd bilayer with decreasing temperature, we show that the spin pumping is not responsible for the result. By combining our findings with systematic measurement data of Py/Cu/Gd contrast samples, we conclude that an effective damping enhancement from a decrease in temperature is due to the temperature-dependent magnetic moment of Gd and antiferromagnetic coupling between Py and Gd. Further, we perform a semiquantitative analysis of the experimental data using the Landau-Lifshitz-Gilbert equations that consider the antiferromagnetic coupling between Py and Gd, and estimated the damping parameters in the range of 0.3--0.4 for Gd films with thicknesses of 5 and 8 nm. Our results suggest that to analyze the spin transport in heterostructure with several magnetic layers, it is necessary to commence from the fundamentals of magnetization dynamics considering interlayer coupling and avoid the overuse of spin pumping.
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影响因子：
8.6
作者：
D. Haskel;G. Srajer;Jonathan Lang;J. Pollmann;C. Nelson;J. Jiang;Sam Bader
通讯作者：
D. Haskel;G. Srajer;Jonathan Lang;J. Pollmann;C. Nelson;J. Jiang;Sam Bader
影响因子：
3.7
作者：
N. Reynolds;Priyamvada Jadaun;Priyamvada Jadaun;J. Heron;C. Jermain;Jonathan Gibbons;R. Collette;R. Buhrman;D. Schlom;D. Ralph
通讯作者：
N. Reynolds;Priyamvada Jadaun;Priyamvada Jadaun;J. Heron;C. Jermain;Jonathan Gibbons;R. Collette;R. Buhrman;D. Schlom;D. Ralph
影响因子：
--
作者：
WANGSNESS, RK
通讯作者：
WANGSNESS, RK
影响因子：
2.7
作者：
Drovosekov, A. B.;Savitsky, A. O.;Ustinov, V. V.
通讯作者：
Ustinov, V. V.
影响因子：
16.6
作者：
Qiu, Zhiyong;Li, Jia;Hou, Dazhi;Arenholz, Elke;N'Diaye, Alpha T.;Tan, Ali;Uchida, Ken-ichi;Sato, Koji;Okamoto, Satoshi;Tserkovnyak, Yaroslav;Qiu, Z. Q.;Saitoh, Eiji
通讯作者：
Saitoh, Eiji