Irreversible shape distortions by flux-pinning-induced magnetostriction in hard type-II superconductors
Irreversible shape distortions by flux-pinning-induced magnetostriction in hard type-II superconductors
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DOI：
10.1103/physrevlett.80.4757
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发表时间：
1997-12
期刊：
影响因子：
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通讯作者：
Tom H. Johansen;J. Lothe;H. Bratsberg
中科院分区：
文献类型：
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作者：
Tom H. Johansen;J. Lothe;H. Bratsberg
奥斯陆大学物理学系，P.O。Box 1048，Blindern，0316 OSLO 3，挪威。（2008年2月1日），在长圆柱体中，可为型号诱导的磁铁诱导的长圆柱体获得精确的分析结果磁场对横截面区域的不可逆变形发现了新的效果：而电路的磁截图是形状的，这表明正方形的横截面变形与考虑到cackex cackavex，convex，convex，convex，convex，convex，convex，预测更复杂的扭曲是对膨胀观测的强烈含义。
Department of Physics, University of Oslo, P.O. Box 1048, Blindern, 0316 Oslo 3, Norway.(February 1, 2008)Exact analytical results are obtained for the flux-pinning-induced magnetostriction in long cylindersof type-II superconductors placed in a parallel magnetic field. New effects are found regardingthe irreversible deformation of the cross-sectional area: Whereas the magnetostriction of a circularcylinder is shape conserving, it is shown that a square cross-section deforms with considerabledistortion. During a field cycle both concave, convex, and even more complicated distortions arepredicted. The strong implications for the interpretation of dilatometric observations are pointedout. The main results obtained for both the circular and square geometry are valid for any critical-state model, j