Observation of microscopic currents in superconducting ceramics

被引：24

作者：

Albrecht, J ^{[1
]}

Jooss, C ^{[1
]}

Warthmann, R ^{[1
]}

Forkl, A ^{[1
]}

Kronmuller, H ^{[1
]}

机构：

[1] Max Planck Inst Met Forsch, D-70506 Stuttgart, Germany

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.57.10332

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The microscopic screening currents circulating in the grains of the ceramic high-T-c superconductor YBa2Cu3O7-delta in a magnetic field are visualized by computing the current density with high spatial resolution of more than 10(6) pixels from magneto-optic images taken at the specimen surface with the same high resolution. Having solved several technical and mathematical problems, we can visualize the supercurrent density distribution inside and between the grains of a macroscopic polycrystalline specimen and make quantitative statements. Our method may thus be used to optimize the current-carrying capability of superconducting ceramics. [S0163-1829(98)09817-8].

引用

页码：10332 / 10335

页数：4

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