MAGNETIC-RELAXATION EFFECTS IN PBMO6S8 SUPERCONDUCTING SINGLE-CRYSTALS - A COMPARISON WITH HIGH-TC SUPERCONDUCTORS

被引：62

作者：

ROSSEL, C ^{[1
]}

SANDVOLD, E ^{[1
]}

SERGENT, M ^{[1
]}

CHEVREL, R ^{[1
]}

POTEL, M ^{[1
]}

机构：

[1] UNIV RENNES 1,CNRS,UA 254,F-35042 RENNES,FRANCE

来源：

PHYSICA C | 1990年 / 165卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(90)90197-M

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetic measurements performed on PbMo6S8 single crystals show that this classic isotropic superconductor (Tc = 14.5 K) presents surprisingly similar irreversibility and relaxation properties as those generally attributed to layered high-Tc superconductors. An irreversibility line H* = H*0(1-t)m with m∼ 3 2 is observed for H {less-than or approximate} 1 kOe. From the magnetic relaxation rates measured below this irreversibility line, activation energies U0 around 15 meV are derived within the flux creep picture. The similarity with the high-Tc oxides is explained by the very short coherence length ξ ≈ 25 Å of PbMo6S8 which also makes this compound sensitive to disorder and local defects. © 1990.

引用

页码：233 / 240

页数：8

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