Improvement on the magneto-optical Kerr effect of cobalt film with a quadrilayer structure

doi:10.1088/1674-1056/22/8/087802

Abstract The magneto-optical Kerr effect of the HfO₂/Co/HfO₂/Al multilayer structure is investigated in this work, and an obvious cavity enhancement of the Kerr response for the HfO₂ semiconductor is found both theoretically and experimentally. Surprisingly, a maximum value of about-3° of the polar Kerr rotation for s-polarized incident light is observed in our experiment. We propose that this improvement on the Kerr effect can be attributed to the multiple reflection and optical interference in the cavity, which can also be proved by simulation using the finite element method.

Keywords: resonant optical cavity magneto-optical effects magneto-optical recording

Received: 28 February 2013
Revised: 22 March 2013
Accepted manuscript online:

PACS:	78.20.Ls	(Magneto-optical effects)
	75.50.Ss	(Magnetic recording materials)
	75.30.Gw	(Magnetic anisotropy)
	42.79.Vb	(Optical storage systems, optical disks)

Fund: Project supported by the National Key Project of Fundamental Research of China (Grant Nos. 2012CB932304 and 2010CB923404), the National Natural Science Foundation of China (Grant Nos. 50971070 and U1232210), and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

Corresponding Authors: Tang Shao-Long
E-mail: tangsl@nju.edu.cn

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Zhang Shao-Yin (张绍银), Tang Shao-Long (唐少龙), Gao Jin-Long (高锦龙), Luo Xiao-Jing (罗晓婧), Xia Wen-Bin (夏文斌), Du You-Wei (都有为) Improvement on the magneto-optical Kerr effect of cobalt film with a quadrilayer structure 2013 Chin. Phys. B 22 087802

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Improvement on the magneto-optical Kerr effect of cobalt film with a quadrilayer structure

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