Fabrication and magnetocrystalline anisotropy of NiCo(002) films

doi:10.1088/1674-1056/24/3/037507

Abstract

A series of 30-nm-thick epitaxial Ni_xCo_1-x (002) alloy films are fabricated by DC magnetron sputtering. MgO (002) and SrTiO₃ (002) single substrates are used for x>0.5 and x<0.5, respectively. The magnetocrystalline anisotropy of Ni_xCo_1-x (002) alloy films is studied in the entire composition region for 0≤x≤ 1.0. When x decreases, the cubic magnetic anisotropy constant K₁ changes sign from negative to positive at x=0.96 and becomes negative again at x= 0.79. It becomes more negative as x decreases from 0.79 to 0. The uniaxial anisotropy K_u is smaller than the K₁ by a factor of two orders.

Keywords: face centered cubic CoNi alloy magnetocrystalline anisotropy

Received: 26 July 2014
Revised: 14 October 2014
Accepted manuscript online:

PACS:	75.70.-i	(Magnetic properties of thin films, surfaces, and interfaces)
	75.30.Gw	(Magnetic anisotropy)
	75.50.Cc	(Other ferromagnetic metals and alloys)

Fund:

Project supported by the National Natural Science Foundation of China (Grant Nos. 11374227, 51331004, 51171129, and 51201114) and the Shanghai Science and Technology Committee, China (Grant Nos. 0252nm004, 13XD1403700, and 13520722700).

Corresponding Authors: Zhou Shi-Ming
E-mail: shiming@tongji.edu.cn

Cite this article:

Fan Wei-Jia (樊维佳), Ma Li (马丽), Shi Zhong (时钟), Zhou Shi-Ming (周仕明) Fabrication and magnetocrystalline anisotropy of NiCo(002) films 2015 Chin. Phys. B 24 037507

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