Strong perpendicular magnetic anisotropy in Co2FeAl0.5Si0.5 film sandwiched by MgO layers

doi:10.1088/1674-1056/22/5/057305

Abstract Co₂FeAl_0.5Si_0.5 (CFAS) based multilayers sandwiched by MgO layers have been deposited and annealed at different temperatures. Perpendicular magnetic anisotropy (PMA) with the magnetic anisotropy energy density K_u ≈ 2.5×10⁶ erg/cm³ and the coercivity H_c=363 Oe has been achieved in the Si/SiO₂/MgO (1.5 nm)/CFAS (2.5 nm)/MgO (0.8 nm)/Pt (5 nm) film annealed at 300 ℃. The strong PMA is mainly due to the top MgO layer. The structure can be used as top magnetic electrodes in half-metallic perpendicular magnetic tunnel junctions.

Keywords: half-metallic ferromagnets MgO layers perpendicular magnetic anisotropy

Received: 24 May 2012
Revised: 30 November 2012
Accepted manuscript online:

PACS:	73.43.Qt	(Magnetoresistance)
	72.25.Ba	(Spin polarized transport in metals)
	68.35.Ct	(Interface structure and roughness)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 50831002, 51271020, 50971025, 51071022, and 11174031), the National Basic Research Program of China (Grant No. 2012CB932702), PCSIRT, Beijing Nova Program, China (Grant No. 2011031), the Beijing Municipal Natural Science Foundation, China (Grant No. 2102032), and the Fundamental Research Funds for the Central Universities, China.

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

Cite this article:

Wang Sheng (王圣), Li Xiao-Qi (李晓其), Bai Li-Juan (白丽娟), Xu Xiao-Guang (徐晓光), Miao Jun (苗君), Jiang Yong (姜勇) Strong perpendicular magnetic anisotropy in Co₂FeAl_0.5Si_0.5 film sandwiched by MgO layers 2013 Chin. Phys. B 22 057305

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Strong perpendicular magnetic anisotropy in Co2FeAl0.5Si0.5 film sandwiched by MgO layers

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Strong perpendicular magnetic anisotropy in Co₂FeAl_0.5Si_0.5 film sandwiched by MgO layers