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

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

doi:10.1063/1.351826

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

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

Research output: Contribution to journal › Article › peer-review

105 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 J_s and (ii) a uniform volume current J_v. This J_s + J_v 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 J_s + J_v model, and the result agrees well with that measured by standard vibrating sample magnetometer (VSM). As a consequence, J_c predicted by VSM methods agrees with J _c predicted from the J_s + J_v model. The field mapping method described is also useful to reveal the granular structure of large HTS samples and regions of weak links.

Original language	English
Pages (from-to)	1013-1020
Number of pages	8
Journal	Journal of Applied Physics
Volume	72
Issue number	3
DOIs	https://doi.org/10.1063/1.351826
Publication status	Published - 1992

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.351826

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

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.",

author = "Chen, {In Gann} and Jianxiong Liu and Roy Weinstein and Kwong Lau",

year = "1992",

doi = "10.1063/1.351826",

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volume = "72",

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T1 - Characterization of YBa2Cu3O7, including critical current density Jc, by trapped magnetic field

AU - Chen, In Gann

AU - Liu, Jianxiong

AU - Weinstein, Roy

AU - Lau, Kwong

PY - 1992

Y1 - 1992

N2 - 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.

AB - 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.

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

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