MUON SPIN RELAXATION IN HEAVY-FERMION SYSTEMS

被引：33

作者：

LUKE, GM

KEREN, A

LE, LP

UEMURA, YJ

WU, WD

BONN, D

TAILLEFER, L

GARRETT, JD

ONUKI, Y

机构：

[1] MCMASTER UNIV, INST MAT RES, HAMILTON L8S 4M1, ONTARIO, CANADA

[2] UNIV TSUKUBA, INST MAT SCI, TSUKUBA, IBARAKI 305, JAPAN

[3] UNIV BRITISH COLUMBIA, DEPT PHYS, VANCOUVER V6T 2A3, BC, CANADA

[4] MCGILL UNIV, MONTREAL H3A 2T8, QUEBEC, CANADA

[5] MCMASTER UNIV, DEPT PHYS, HAMILTON L8S 4M1, ONTARIO, CANADA

来源：

HYPERFINE INTERACTIONS | 1994年 / 85卷 / 1-4期

关键词：

D O I：

10.1007/BF02069451

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

Heavy fermion systems have received a great deal of study by a wide variety of techniques, including muSR. In a number of systems, coexisting superconducting and magnetic states have been reported, leading to speculation of an intimate connection between magnetism and superconductivity in these compounds. We observe a spontaneous magnetic field in the superconducting phase of UPt3. In addition, the broadening of the transverse field muon precession signal only onsets approximately 60 mK below the superconducting T(c). Our results provide evidence that the ''lower superconducting phase'' in the H-T phase diagram of UPt3 is characterised by broken time-reversal symmetry. Measurements of URu2Si2 and CeCu2.2Si2 indicate that the magnetically ordered volume fraction is temperature dependent in both systems.

引用

页码：397 / 409

页数：13

共 33 条

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