中国物理B ›› 1996, Vol. 5 ›› Issue (2): 120-125.doi: 10.1088/1004-423X/5/2/005

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INFLUENCE OF IN-PLANE FIELD ON THE CRITICAL TEMPERATURE FOR THE BREAKDOWN OF VERTICAL BLOCH LINE CHAINS

霍素国1, 韩宝善2, 张宏愿2, 孟广庆2   

  1. (1)Department of Physics, Hebei Teachers University, Shijiazhuang 050016, China; (2)State Key Laboratory for Magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China
  • 收稿日期:1994-12-01 出版日期:1996-02-20 发布日期:1996-02-20
  • 基金资助:
    Project supported in part by the National Natural Science Foundation of China and by the National Science Foundation of Hebei Province.

INFLUENCE OF IN-PLANE FIELD ON THE CRITICAL TEMPERATURE FOR THE BREAKDOWN OF VERTICAL BLOCH LINE CHAINS

HAN BAO-SHAN (韩宝善), HUO SHU-GUO (霍素国)a, ZHANG HONG-YUAN (张宏愿), MENG GUANG-QING (孟广庆)   

  1. State Key Laboratory for Magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China; a Department of Physics, Hebei Teachers University, Shijiazhuang 050016, China
  • Received:1994-12-01 Online:1996-02-20 Published:1996-02-20
  • Supported by:
    Project supported in part by the National Natural Science Foundation of China and by the National Science Foundation of Hebei Province.

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摘要： The influence of in-plane field Hip on the critical temperature T0 for the breakdown of vertical Bloch line (VBL) chains of hard domains in garnet bubble films has been inves-tigated experimentally. It was found that T0 can be significantly reduced by the increase of Hip. Besides, the critical in-plane field H′ip for the breakdown of VBL chains was measured as a function of temperature T for the same sample. As a result, the correlation between these two critical parameters, T0 and H′ip, was found. By introducing an effective in-plane field (Hip)e, the positive definiteness of the system of VBL pairs with two-dimemsional magnetization distribution was analyzed, giving rise to a theoretical expression of H′ip(T): H′ip(T) =|4πMsQ(a0+a1Q +a2Q2+a3Q3+ a4Q4)|T(T0(Hip=0)), where ai are constants. It agrees well with the experiments.

Abstract: The influence of in-plane field Hip on the critical temperature T0 for the breakdown of vertical Bloch line (VBL) chains of hard domains in garnet bubble films has been inves-tigated experimentally. It was found that T0 can be significantly reduced by the increase of Hip. Besides, the critical in-plane field H′ip for the breakdown of VBL chains was measured as a function of temperature T for the same sample. As a result, the correlation between these two critical parameters, T0 and H′ip, was found. By introducing an effective in-plane field (Hip)e, the positive definiteness of the system of VBL pairs with two-dimemsional magnetization distribution was analyzed, giving rise to a theoretical expression of H′ip(T): H′ip(T) =|4$\pi$MsQ(a0+a1Q +a2Q2+a3Q3+ a4Q4)|T(T0(Hip=0)), where ai are constants. It agrees well with the experiments.

中图分类号:  (Magnetization curves, hysteresis, Barkhausen and related effects)

  • 75.60.Ej
75.50.Gg (Ferrimagnetics) 75.70.Ak (Magnetic properties of monolayers and thin films)