Focal voltage-current characteristics in high-Tc superconductors

被引：12

作者：

Giller, D ^{[1
]}

Abulafia, Y ^{[1
]}

Prozorov, R ^{[1
]}

Wolfus, Y ^{[1
]}

Shaulov, A ^{[1
]}

Yeshurun, Y ^{[1
]}

机构：

[1] Bar Ilan Univ, Dept Phys, Inst Superconduct, IL-52900 Ramat Gan, Israel

来源：

PHYSICAL REVIEW B | 1998年 / 57卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.57.R14080

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Local electric field versus current density (E-j) curves were measured in YBa2Cu3O7-delta and Nd1.85Ce0.15CuO4-delta single crystals using a miniature Hall-sensors array. Measurements in the field range corresponding to the anomalous magnetization peak in these crystals reveal remarkably different E-j characteristics below and above the peak, indicating a crossover in the flux-creep mechanism. Similar E-j behavior, as observed here in YBa2Cu3O7-delta and Nd1.85Ce0.15CuO4-delta, is expected universally in every superconductor exhibiting the anomalous peak.

引用

页码：R14080 / R14083

页数：4

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