AC RESPONSE OF THE VORTEX SYSTEM IN A PR1.85CE0.15CUO4-Y SINGLE-CRYSTAL

被引：40

作者：

FABREGA, L ^{[1
]}

FONTCUBERTA, J ^{[1
]}

PINOL, S ^{[1
]}

VANDERBEEK, CJ ^{[1
]}

KES, PH ^{[1
]}

机构：

[1] LEIDEN UNIV,KAMERLINGH ONNES LAB,2300 RA LEIDEN,NETHERLANDS

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.47.15250

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the field, frequency, and amplitude dependence of the ac susceptibility on a single crystal of the electron-doped superconductor Pr1.85Ce0.15CuO4-y. We show that a thermally activated flux motion over effective energy barriers U(T,H) = U0(1 - T/T(c))H-0.6, with U0 almost-equal-to 40 meV, can account for the dc-field and frequency effects. The amplitude dependence of the ac response in this superconducting system is discussed and it is argued that it is a signature of the critical state.

引用

页码：15250 / 15255

页数：6

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