Characterization of YBa2Cu3O7, including critical current density Jc, by trapped magnetic field

In Gann Chen, Jianxiong Liu, Roy Weinstein, Kwong Lau

Research output: Contribution to journalArticlepeer-review

102 Citations (Scopus)

Abstract

Spatial distributions of persistent magnetic field trapped by sintered and melt-textured ceramic-type high-temperature superconductor (HTS) samples have been studied. The trapped field can be reproduced by a model of the current consisting of two components: (i) a surface current Js and (ii) a uniform volume current Jv. This Js + Jv model gives a satisfactory account of the spatial distribution of the magnetic field trapped by different types of HTS samples. The magnetic moment can be calculated, based on the Js + Jv model, and the result agrees well with that measured by standard vibrating sample magnetometer (VSM). As a consequence, Jc predicted by VSM methods agrees with J c predicted from the Js + Jv model. The field mapping method described is also useful to reveal the granular structure of large HTS samples and regions of weak links.

Original languageEnglish
Pages (from-to)1013-1020
Number of pages8
JournalJournal of Applied Physics
Volume72
Issue number3
DOIs
Publication statusPublished - 1992

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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