Tuning the magnetic anisotropy of CoFeB grown on flexible substrates

doi:10.1088/1674-1056/24/7/077501

Abstract

The magnetic properties of CoFeB thin films grown on flexible polyimide substrates were investigated using a magneto-optical Kerr effect magnetometer. In-plane uniaxial magnetic anisotropy was observed in the virgin state. The strain induced by bending the flexible substrate was applied on the sample to change the magnetic properties of CoFeB. The strain induced uniaxial magnetic anisotropy changed linearly with the deformation by about 8.41×10⁴ erg/cm³ at 1% of deformation. Our results prove the magnetic properties of CoFeB grown on flexible polyimide substrate can be tuned effectively by bending, which could be important for future flexible spintronics.

Keywords: magnetic anisotropy bending strain magneto-optical Kerr effect magnetometer

Received: 09 February 2015
Revised: 10 April 2015
Accepted manuscript online:

PACS:	75.30.Gw	(Magnetic anisotropy)
	75.60.Jk	(Magnetization reversal mechanisms)
	75.60.Ej	(Magnetization curves, hysteresis, Barkhausen and related effects)

Fund:

Project supported by the National Basic Research Program of China (Grant Nos. 2011CB922201 and 2015CB921401) and the National Natural Science Foundation of China (Grant Nos. 11174272, 11474272, 11274371, 51431009, and 61225021).

Corresponding Authors: Wang Shou-Guo, Wang Kai-You
E-mail: sgwang@iphy.ac.cn;kywang@semi.ac.cn

Cite this article:

Zhang Hao (张昊), Li Yuan-Yuan (李媛媛), Yang Mei-Yin (杨美音), Zhang Bao (张保), Yang Guang (杨光), Wang Shou-Guo (王守国), Wang Kai-You (王开友) Tuning the magnetic anisotropy of CoFeB grown on flexible substrates 2015 Chin. Phys. B 24 077501

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