Study of magnetization reversal and anisotropy of single crystalline ultrathin Fe/MgO (001) film by magneto-optic Kerr effect

doi:10.1088/1674-1056/25/4/047503

Abstract The magnetization reversal process of Fe/MgO (001) thin film is investigated by combining transverse and longitudinal hysteresis loops. Owing to the competition between domain wall pinning energy and weak uniaxial magnetic anisotropy，the typical magnetization reversal process of Fe ultrathin film can take place via either an “l-jump” process near the easy axis, or a “2-jump” process near the hard axis, depending on the applied field orientation. Besides, the hysteresis loop presents strong asymmetry resulting from the variation of the detected light intensity due to the quadratic magneto-optic effect. Furthermore, we modify the detectable light intensity formula and simulate the hysteresis loops of the Kerr signal. The results show that they are in good agreement with the experimental data.

Keywords: magnetization reversal process magneto-optic Kerr effect magnetic anisotropy

Received: 10 November 2015
Revised: 22 December 2015
Accepted manuscript online:

PACS:	75.60.Jk	(Magnetization reversal mechanisms)
	42.65.Hw	(Phase conjugation; photorefractive and Kerr effects)
	75.30.Gw	(Magnetic anisotropy)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11274033, 11474015, and 61227902), the Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20131102130005), and the Beijing Key Discipline Foundation of Condensed Matter Physics.

Corresponding Authors: Zi-Yu Chen
E-mail: chenzy@buaa.edu.cn

Cite this article:

Miao-Ling Zhang(张苗玲), Jun Ye(叶军), Rui Liu(刘锐), Shu Mi(米菽), Yong Xie(谢勇), Hao-Liang Liu(刘郝亮), Chris Van Haesendonck, Zi-Yu Chen(陈子瑜) Study of magnetization reversal and anisotropy of single crystalline ultrathin Fe/MgO (001) film by magneto-optic Kerr effect 2016 Chin. Phys. B 25 047503

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Study of magnetization reversal and anisotropy of single crystalline ultrathin Fe/MgO (001) film by magneto-optic Kerr effect

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