Thermally activated flux creep in K3C60 single crystals

被引：5

作者：

Buntar, V

Sauerzopf, FM

Weber, HW

Fischer, JE

Kuzmany, H

Haluska, M

Lin, CL

机构：

[1] UNIV PENN,DEPT MAT SCI & ENGN,PHILADELPHIA,PA 19104

[2] UNIV PENN,RES STRUCT MATTER LAB,PHILADELPHIA,PA 19104

[3] UNIV VIENNA,INST FESTKORPERPHYS,A-1090 VIENNA,AUSTRIA

[4] TEMPLE UNIV,DEPT PHYS,PHILADELPHIA,PA 19122

[5] TEMPLE UNIV,DEPT PHYS,PHILADELPHIA,PA 19122

[6] TEMPLE UNIV,MAT RES CTR,PHILADELPHIA,PA 19122

来源：

PHYSICAL REVIEW B | 1996年 / 54卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.54.14952

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Long-term magnetic relaxation in the fullerene superconductor K3C60 was measured on crystalline samples in a wide range of temperatures and magnetic fields. A logarithmic M(t) dependence is observed on single crystals with 100% shielding fraction. The relaxation rate at different magnetic fields increases progressively with temperature. The flux-creep activation energy is found to be in the range from 10 to 80 meV with a peak in its temperature dependence. From measurements on samples with nonperfect stoichiometry we show that inhomogeneities strongly affect the relaxation process and may mask a logarithmic behavior.

引用

页码：14952 / 14955

页数：4

共 24 条

[1] HARD SUPERCONDUCTIVITY - THEORY OF MOTION OF ABRIKOSOV FLUX LINES [J].