Influence of Spatial-Distribution of Trapped Magnetic-Flux on the Effective Pinning Energy of Vortices in Ceramic Y-Ba-Cu-O
Relaxation of the isothermoremanent magnetization M(IR) has been studed in ceramic Y-Ba-Cu-O. The value of the effective pinning energy U(eff) has been determined at different temperatures according the relationship dlnM(IR)/dlnt = - kT/U(eff). It was shown that the dependence of U(eff) on the magnetizing field H(o) can be attributed to the evolution of the trapped flux distribution (as H(o) is varied) without involving any assumptions about the dependence of the pinning barrier on the field.
Keywords: high-temperature superconductors
Blinov, Ev Univ Turku,Wihuri Phys Lab,Sf-20500 Turku 50,Finland Af Ioffe Phys Tech Inst,St Petersburg 194021,Russia
Cited References Count:5
Record created on 2006-08-21, modified on 2016-08-08