TETRACRITICAL POINTS AND THE SUPERCONDUCTING PHASES OF UPT3 - UNIAXIAL PRESSURE EFFECTS

被引：30

作者：

BOUKHNY, M ^{[1
]}

BULLOCK, GL ^{[1
]}

SHIVARAM, BS ^{[1
]}

HINKS, DG ^{[1
]}

机构：

[1] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.73.1707

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using signatures in the longitudinal sound velocity we have mapped for the first time experimentally the pressure dependence of the phase boundaries in superconducting UPt3 for magnetic field H parallel to the a axis. With increasing pressure P-c parallel to the c axis, the tetracritical point in the H-T plane is observed to shift to lower H and higher temperature T. At a critical stress, P-c similar to 2.6 kbar the tetracritical point reaches the H = O, P-c - T plane, and our measurements prove coexistence of at least four phases in this plane as well.

引用

页码：1707 / 1710

页数：4

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