Spin pumping at the Co2FeAl0.5Si0.5/Pt interface

doi:10.1088/1674-1056/23/1/018503

Abstract Spin pumping at the Co₂FeAl_0.5Si_0.5/Pt and Pt/Co₂FeAl_0.5Si_0.5 interfaces has been studied by ferromagnetic resonance technology (FMR). The spin mixing conductance of the Co₂FeAl_0.5Si_0.5/Pt and Pt/Co₂FeAl_0.5Si_0.5 interfaces was determined to be 3.7×10¹⁹ m^-2 and 2.1×10¹⁹ m^-2 by comparing the Gilbert damping in a Co₂FeAl_0.5Si_0.5 single film, Co₂FeAl_0.5Si_0.5/Pt bilayer film and a Pt/Co₂FeAl_0.5Si_0.5/Pt trilayer film. Spin pumping is more efficient in the Co₂FeAl_0.5Si_0.5/Pt bilayer film than in permalloy/Pt bilayer film.

Keywords: spin pumping spin mix conductance Gilbert damping constant Co₂FeAl_0.5Si_0.5

Received: 29 March 2013
Revised: 09 May 2013
Accepted manuscript online:

PACS:	85.75.-d	(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)
	07.57.Pt	(Submillimeter wave, microwave and radiowave spectrometers; magnetic resonance spectrometers, auxiliary equipment, and techniques)
	46.40.Ff	(Resonance, damping, and dynamic stability)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2012CB932702), the National Natural Science Foundation of China (Grant Nos. 51271020, 51071022, and 11174031), the Program for Changjiang Scholars and Innovative Research Team in University, China (PCSIRT), the Beijing Nova Program, China (Grant No. 2011031), and the Fundamental Research Funds for the Central Universities of Ministry of Education of China.

Corresponding Authors: Xu Xiao-Guang
E-mail: xgxu@ustb.edu.cn

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Wu Yong (吴勇), Zhao Yue-Lei (赵月雷), Xiong Qiang (熊强), Xu Xiao-Guang (徐晓光), Sun Young (孙阳), Zhang Shi-Qing (张十庆), Jiang Yong (姜勇) Spin pumping at the Co₂FeAl_0.5Si_0.5/Pt interface 2014 Chin. Phys. B 23 018503

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Spin pumping at the Co2FeAl0.5Si0.5/Pt interface

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Spin pumping at the Co₂FeAl_0.5Si_0.5/Pt interface