Tuning the spin pumping characteristics in Ni81Fe19/CuNx bilayer films

We demonstrate that the spin pumping effect can be effectively tuned with nitriding the nonmagnetic layer in ferromagnetic/nonmagnetic (FM/NM) bilayer system. Series of Ni81Fe19/CuNx bilayer films were prepared by magnetron sputtering with different nitrogen partial pressures from 0% to 20%. The sta...

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Published in:Journal of applied physics 2013-05, Vol.113 (17)
Main Authors: Jin, Lichuan, Zhang, Huaiwu, Tang, Xiaoli, Zhong, Zhiyong
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Language:English
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creator Jin, Lichuan
Zhang, Huaiwu
Tang, Xiaoli
Zhong, Zhiyong
description We demonstrate that the spin pumping effect can be effectively tuned with nitriding the nonmagnetic layer in ferromagnetic/nonmagnetic (FM/NM) bilayer system. Series of Ni81Fe19/CuNx bilayer films were prepared by magnetron sputtering with different nitrogen partial pressures from 0% to 20%. The static magnetic properties of the Ni81Fe19/CuNx bilayer films were studied by vibrating sample magnetometer and dynamic magnetic properties was studied using a coplanar waveguide vector-network-analyzer ferromagnetic resonance spectrometer with an in-plane configuration. The results reveal that the static magnetic properties are not noticeably changed with capping a nitrified copper layer. Both the linewidth and the Gilbert damping parameter are strongly influenced by the nitrogen partial pressure during the copper layer nitride process. The spin-mixing conductance of the NiFe/CuNx bilayer films was quantified from the peak-to-peak linewidth of ferromagnetic resonance spectra based on the model of the spin pumping.
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title Tuning the spin pumping characteristics in Ni81Fe19/CuNx bilayer films
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