Long term magnetic relaxation in single crystalline K3C60 superconductors

被引：0
|
作者：
Buntar, V
Sauerzopf, FM
Weber, HW
Fischer, JE
Kuzmany, H
Haluska, M
Lin, CL
机构：
来源：
PROCEEDINGS OF THE SYMPOSIUM ON RECENT ADVANCES IN THE CHEMISTRY AND PHYSICS OF FULLERENES AND RELATED MATERIALS, VOL 3 | 1996年 / 96卷 / 10期
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中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Long-term magnetic relaxation in the fullerene superconductor K3C60 was measured on single crystals in a wide range of temperatures and magnetic fields. A logarithmic M(t) dependence is observed on samples 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 non-perfect stoichiometry we show that inhomogeneities strongly affect the relaxation process and may mask a logarithmic behaviour.
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页码：438 / 445
页数：8
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