Magnetic properties of high-Tc superconducting grains

Du Xing Chen, Alvaro Sanchez

Research output: Contribution to journalArticleResearchpeer-review

28 Citations (Scopus)

Abstract

A phenomenological model has been developed for interpreting the magnetic properties of hard type-II superconductors. By means of a volume and a surface supercurrent density, this model considers the effects of the bulk flux pinning, the thermal equilibrium magnetization, and the surface barrier. Based on this model, several difficult problems concerning the explanation of the hysteresis loop and susceptibility data of high-Tc superconducting grains are solved. Our work demonstrates the presence of a surface-barrier effect in high-Tc superconductors. Accordingly, some past work on Hc1 and Jc determination and ac loss mechanism should be reinterpreted. © 1992 The American Physical Society.
Original languageEnglish
Pages (from-to)10793-10796
JournalPhysical Review B
Volume45
Issue number18
DOIs
Publication statusPublished - 1 Jan 1992

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