Giant damping enhancement induced by exchange coupling in Y3Fe5O12/Co2FeAl0.5Si0.5 bilayers
Giant damping enhancement induced by exchange coupling in Y3Fe5O12/Co2FeAl0.5Si0.5 bilayers
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Y3Fe5O12/Co2FeAl0.5Si0.5 双层中交换耦合引起的巨阻尼增强
DOI:
10.1016/j.jallcom.2018.07.142
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发表时间:
2018-10
影响因子:
6.2
通讯作者:
Jin Lichuan
中科院分区:
文献类型:
--
作者:
Li Mingming;Zhang Huaiwu;Rao Y. H.;Hong Caiyun;Zhong Zhiyong;Yang Qinghui;Tang Xiaoli;Jin Lichuan
Gilbert damping enhancement induced by the spin pumping effect is investigated in Y 3 Fe 5 O 12 (YIG)/heavy metal bilayers. Because its spin polarization is high and Gilbert damping is low, Co 2 FeAl 0.5 Si 0.5 (CFAS) is deemed a promising ferromagnetic material in spintronics devices. We studied microwave dynamic magnetizations in YIG/CFAS bilayers combined with ferromagnetic resonance measurement using a vector network analyzer to reveal a 5-fold giant damping enhancement compared with that for the YIG/Pt bilayers. This phenomenon was attributed to both the exchange coupling effect and spin pumping effect. By inserting a 10-nm Cu spacer, direct exchange coupling can be suppressed. A spin mixing conductance g e f f↑↓ of 7.75× 10 18 m− 2 generated by spin pumping was obtained. The study provides an effective approach to tailor the damping in magnetic thin films.
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Wang Jing;Huang Qikun;Shi Peng;Zhang Kun;Tian Yufeng;Yan Shishen;Chen Yanxue;Liu Guotei;Kang Shishou;Mei Liangmo
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Mei Liangmo
影响因子:
4.6
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Zeng, Zhongming;Finocchio, Giovanni;Zhang, Baoshun;Amiri, Pedram Khalili;Katine, Jordan A.;Krivorotov, Ilya N.;Huai, Yiming;Langer, Juergen;Azzerboni, Bruno;Wang, Kang L.;Jiang, Hongwen
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Jiang, Hongwen
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3.7
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Hailong Wang;C. Du;Yong Pu;R. Adur;P. Hammel;Fengyuan Yang
影响因子:
8.6
作者:
Liu, Luqiao;Moriyama, Takahiro;Buhrman, R. A.
通讯作者:
Buhrman, R. A.
影响因子:
4
作者:
Jungfleisch, M. B.;Lauer, V.;Hillebrands, B.
通讯作者:
Hillebrands, B.