UNIAXIAL PRESSURE-DEPENDENCE OF THE CRITICAL-FIELD ANISOTROPY IN UPT3

被引：5

作者：

BOUKHNY, M ^{[1
]}

BULLOCK, GL ^{[1
]}

SHIVARAM, BS ^{[1
]}

HINKS, DG ^{[1
]}

机构：

[1] ARGONNE NATL LABS,DIV MAT SCI,ARGONNE,IL 60639

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 1994年 / 69卷 / 06期

关键词：

D O I：

10.1080/09500839408242440

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

UPt3 is known to possess a unique phase diagram. Close to T(c), three superconducting phases A, B and C coexist with the normal phase N giving rise to a tetracritical point. Furthermore, the anisotropy in the upper critical field H(c2) near T(c) is reversed at low temperatures. In this letter we show that the behaviour under uniaxial pressure is unusual as well. For pressure, P(c) parallel to the c axis, H(c2) is enhanced at low temperatures for H parallel to the a axis but is depressed for H parallel to c. In contrast the B-C transition is always depressed with increasing P(c) for both the field orientations. Order-parameter candidates selected to explain the tetracritical point in the phase diagram of UPt3 near T(c) must also yield results consistent with the behaviour of the phase lines observed by us at low temperatures.

引用

页码：319 / 326

页数：8

共 25 条

[1] PHASE-DIAGRAM OF UPT3 FROM ULTRASONIC VELOCITY-MEASUREMENTS [J].