Current-Voltage Characteristics of Superconducting Foils in Small Oscillatory Magnetic Fields
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概要
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The current-voltage characteristics of a type II superconducting foil is calculated in terms of the generalized time-dependent Ginzburg-landau equations in case of a superposed small ac magnetic field. The displacement of fluxoids inside the pinning potential is obtained by solving the force balance equation which is derived by minimizing the Helmholtz free energy. The result shows that the mechanism proposed by Derlieu which is based on the critical state model is not fully applicable for a high magnetic field near H_<c2>. Nondissipative component of a transport current density differs from the assumption made by Derlieu and is not always equal to the critical current density. This is due to the fact that the displacement of a fluxoid lattice has a large shear modulus c_<44> whereas an effective spring constant is very small in the vicinity of H_<c2>.
- 社団法人日本物理学会の論文
- 1975-09-15
著者
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Matsushita Teruo
Department Of Computer Science And Electronics Kyushu Institute Of Technology
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Sakamoto Nobuyoshi
Department Of Electrical Engineering Kyushu Industrial University
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Yamafuji Kaoru
Department Of Electronics Faculty Of Engineering Kyushu Univerisity
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Matsushita Teruo
Department Of Electronics Kyusyu University
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SAKAMOTO Nobuyosi
Department of Electric Engineering, Kyusyu Industrial University
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Sakamoto Nobuyosi
Department Of Electric Engineering Kyusyu Industrial University
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Sakamoto Nobuyoshi
Department of Electric Engineering, Kyusyu Industrial University
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