Analysis on Structure, Magnetic and Magneto-Optical Properties of Vacuum Annealed Co/Pt Multilayer Films

Abstract

Abstract: Co/Pt multilayer films were prepared by DC magnetron sputtering. Detailed vacuum annealing was carried out on them. The results show that moderate annealing at lower temperature can imcrease
the coercivity in Co/Pt multilayer films while not affect the shape of Kerr hysterisis loops. Annealing at or above 300℃ will cause the drastic decrease in coercivity, perpendicular magnetic anisotropy and
Kerr rotation in Co/Pt multilayer films. The improvement of crystal structure and the release of stresses in films, the growth of grains, the reduction of effective Co layer thickness caused by atom diffusion
between layers and further the decrease in Curie temperature are considered to be responsible for the changes in magnetic and magneto-optical properties for Co/Pt multilayer films during lower, middle and
higher temperature annealing, respectively.

Key words: magneto-optical films, multilayer films, annealing, coercivity

CLC Number:

TM271 O484

LI Ming,JIANG Zhi-Hong,SHEN De-Fang. Analysis on Structure, Magnetic and Magneto-Optical Properties of Vacuum Annealed Co/Pt Multilayer Films[J]. Journal of Inorganic Materials.

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Analysis on Structure, Magnetic and Magneto-Optical Properties of Vacuum Annealed Co/Pt Multilayer Films

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