中国物理B ›› 2008, Vol. 17 ›› Issue (5): 1902-1906.doi: 10.1088/1674-1056/17/5/059

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Magnetization reversal of Fe ultrathin film on Cu(100)

何 为, 詹清峰, 王得勇, 陈立军, 成昭华   

  1. State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2007-12-17 修回日期:2008-01-20 出版日期:2008-05-20 发布日期:2008-05-20
  • 基金资助:
    Project supported by the State Key Development Program for Basic Research of China (Grant No 2001CB610605) and the National Natural Science Foundation of China (Grant No 10774179).

Magnetization reversal of Fe ultrathin film on Cu(100)

He Wei(何为), Zhan Qing-Feng(詹清峰), Wang De-Yong(王得勇), Chen Li-Jun(陈立军), and Cheng Zhao-Hua(成昭华)†   

  1. State Key Laboratory of Magnetism and Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2007-12-17 Revised:2008-01-20 Online:2008-05-20 Published:2008-05-20
  • Supported by:
    Project supported by the State Key Development Program for Basic Research of China (Grant No 2001CB610605) and the National Natural Science Foundation of China (Grant No 10774179).

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摘要： The magnetization reversal of Fe/Cu(100) ultrathin films grown at room temperature is investigated by using an in situ magneto-optical Kerr effect polarimeter with a magnet that can rotate in a plane of incidence. There occur spin reorientation transitions from out-of-plane to in-plane magnetizations in 8 and 12 monolayers (ML) thick iron films. The coercive fields are observed to be proportional to the reciprocal of the cosine with respect to the easy axis, suggesting that the domain-wall displacement plays a main role in the magnetization reversal process.

关键词: molecular beam epitaxy, surface magnetism, spins reorientation transition, Kerr effect

Abstract: The magnetization reversal of Fe/Cu(100) ultrathin films grown at room temperature is investigated by using an in situ magneto-optical Kerr effect polarimeter with a magnet that can rotate in a plane of incidence. There occur spin reorientation transitions from out-of-plane to in-plane magnetizations in 8 and 12 monolayers (ML) thick iron films. The coercive fields are observed to be proportional to the reciprocal of the cosine with respect to the easy axis, suggesting that the domain-wall displacement plays a main role in the magnetization reversal process.

Key words: molecular beam epitaxy, surface magnetism, spins reorientation transition, Kerr effect

中图分类号:  (Magnetization reversal mechanisms)

  • 75.60.Jk
75.40.Gb (Dynamic properties?) 75.60.Ch (Domain walls and domain structure) 75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.70.Ak (Magnetic properties of monolayers and thin films) 78.20.Ls (Magneto-optical effects)