Low-frequency AC susceptibility due to the interplay of loss mechanisms in HTS

Author

Wei Wang ; Qi, Zhi ; Yu Wang ; Li, Chuanyi ; Chen, Kaixuan ; Lu, Guo ; Yin, Daole ; Xiao, Liye ; Lin, Liangzhen ; Song, Naihao

Author_Institution

Dept. of Phys., Beijing Univ., China

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

2772

Lastpage

2775

Abstract

The analysis of low-frequency ac susceptibility is complicated because the hysteretic losses due to pinning and the eddy-current losses are not simply additive. We show that the electromagnetic response of both ideal and nonideal type-II superconductors can be well described with a common nonlinear response function. This function makes a consistent description of the crossover from the power-law E(J) of flux-creep to the ohmic flux-flow regime. We interpret the scaling behavior of ac susceptibility with this nonlinear equation

Keywords

eddy current losses; flux creep; flux flow; high-temperature superconductors; magnetic hysteresis; magnetic susceptibility; eddy-current losses; electromagnetic response; flux-creep; hysteretic losses; loss mechanisms; low-frequency AC susceptibility; nonlinear response function; ohmic flux-flow regime; scaling behavior; type-II superconductors; Bean model; Critical current; High temperature superconductors; Hysteresis; Maxwell equations; Nonlinear equations; Superconducting materials; Superconductivity; Temperature dependence; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919638

Filename

919638