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INFLUENCE OF IN-PLANE FIELD ON THE CRITICAL TEMPERATURE FOR THE BREAKDOWN OF VERTICAL BLOCH LINE CHAINS
韩宝善, 霍素国, 张宏愿, 孟广庆
1996 (2):
120-125.
doi: 10.1088/1004-423X/5/2/005
摘要
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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.
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