Power-Law Critical-State Model for Magnetization of Type-II Superconductors

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概要

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• The magnetization of a type-II superconductor obeying the power-law critical state model J_c=KB^<-n> is discussed for the case of an infinitely long rectangular bar placed in a parallel field. Explicit formulas are derived for all branches of the high-field hysteresis loop. Both the infinite slab and circular cylinder geometries are included as special cases. It is shown that the vertical width of the hysteresis loop has the asymptotic high-field behavior △M(B_a)×J_c(B_a), with a prefactor given by the geometrical aspect ratio. Also, two more terms in the functional expansion of △M{J_c} are derived. These terms are shown to vanish rapidly when the applied field exceeds the full penetration value. This allows for a new way of extracting J_c(B) from magnetization data.

• 社団法人応用物理学会の論文
• 1995-08-15

著者

• Johansen Tom

  Department Of Physics University Of Oslo

• GALPERIN Yuri

  Department of Physics, University of Oslo

• BRATSBERG Harald

  Department of Physics, University of Oslo

• Galperin Yuri

  Department Of Physics University Of Oslo

• Bratsberg Harald

  Department Of Physics University Of Oslo

関連論文

• Power-Law Critical-State Model for Magnetization of Type-II Superconductors

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