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Acta Physica Sinica (Overseas Edition), 1996, Vol. 5(2): 120-125    DOI: 10.1088/1004-423X/5/2/005
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

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)
State Key Laboratory for Magnetism, Institute of Physics, Academia Sinica, Beijing 100080, China; a Department of Physics, Hebei Teachers University, Shijiazhuang 050016, China
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 Hip 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 Hip, 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 Hip(T): Hip(T) =|4$\pi$MsQ(a0+a1Q +a2Q2+a3Q3+ a4Q4)|T(T0(Hip=0)), where ai are constants. It agrees well with the experiments.
Received:  01 December 1994      Accepted manuscript online: 
PACS:  75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects)  
  75.50.Gg (Ferrimagnetics)  
  75.70.Ak (Magnetic properties of monolayers and thin films)  
Fund: Project supported in part by the National Natural Science Foundation of China and by the National Science Foundation of Hebei Province.

Cite this article: 

HAN BAO-SHAN (韩宝善), HUO SHU-GUO (霍素国), ZHANG HONG-YUAN (张宏愿), MENG GUANG-QING (孟广庆) INFLUENCE OF IN-PLANE FIELD ON THE CRITICAL TEMPERATURE FOR THE BREAKDOWN OF VERTICAL BLOCH LINE CHAINS 1996 Acta Physica Sinica (Overseas Edition) 5 120

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