Perpendicular magnetic anisotropy and thermal stability in Co2FeAl0.5Si0.5/Pt multilayers

Y. Wu, J. Zhang, Z. C. Wang, J. Wang, X. G. Xu, J. Miao, J. X. Zhang, Y. Jiang

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Abstract

Perpendicular magnetic anisotropy (PMA) and thermal stability of Co2FeAl0.5Si0.5(CFAS)/Pt multilayer structure prepared by dc magnetron sputtering have been studied. It is found that the strength of PMA depends on the thickness of CFAS layer, and the maximum effective thickness of CFAS with PMA is demonstrated to be about 1.5 nm. The interfacial anisotropy energy Ksis estimated to be 0.45 erg/cm2, which is larger than those of Co/Pd and Co/Ni multilayers and responsible for the strong PMA of the CFAS/Pt multilayer. The annealing treatments will give rise to the loss of PMA of CFAS/Pt multilayer and has the relatively less influence with large period number N. With the increasing of the period number N, the CFAS/Pt multilayers tend to have wasp-waist-shaped easy-axis hysteresis loops and multidomain structures.

Original languageEnglish (US)
Pages (from-to)773-779
Number of pages7
JournalApplied Physics A: Materials Science and Processing
Volume117
Issue number2
DOIs
StatePublished - Oct 9 2014

Bibliographical note

Funding Information:
This work was partially supported by the National Basic Research Program of China (Grant No. 2012CB932702), the National Natural Science Foundation of China (Grant Nos. 51271020, 11174031, 51371024, 51325101), PCSIRT, Beijing Nova program (Grant No. 2011031), Excellent Talent Funds of Beijing (Grant No. 2012D009006000004) and the Fundamental Research Funds for the Central University.

Publisher Copyright:
© 2014, Springer-Verlag Berlin Heidelberg.

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