COOPERATIVE EFFECTS IN CECU2SI2

被引：49

作者：

LANG, M ^{[1
]}

MODLER, R ^{[1
]}

AHLHEIM, U ^{[1
]}

HELFRICH, R ^{[1
]}

REINDERS, PHP ^{[1
]}

STEGLICH, F ^{[1
]}

ASSMUS, W ^{[1
]}

SUN, W ^{[1
]}

BRULS, G ^{[1
]}

WEBER, D ^{[1
]}

LUTHI, B ^{[1
]}

机构：

[1] UNIV FRANKFURT,INST PHYS,W-6000 FRANKFURT,GERMANY

来源：

PHYSICA SCRIPTA | 1991年 / T39卷

关键词：

D O I：

10.1088/0031-8949/1991/T39/020

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Heavy-fermion superconductivity and other cooperative effects have been explored by thermal expansion, specific heat and ultrasound measurements on CeCu2Si2 single crystals. Crystals annealed under Cu atmosphere show sharp superconducting transitions at T(c)max = 0.63 K. At the same temperature the "as grown", i.e., non-bulk-superconducting, crystals reveal a pronounced phase-transition anomaly, presumably of structural origin. This new transition is associated with an expansion of the volume upon cooling and gives rise to magnetic correlations. Our results indicate a complex interplay between lattice instability, magnetic phenomena and superconductivity in CeCu2Si2.

引用

页码：135 / 139

页数：5

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