MAGNETIC AND SUPERCONDUCTING PROPERTIES OF THE HEAVY-FERMION SUPERCONDUCTOR UPD2AL3

被引：39

作者：

AMATO, A

FEYERHERM, R

GYGAX, FN

SCHENCK, A

WEBER, M

CASPARY, R

HELLMANN, P

SCHANK, C

GEIBEL, C

STEGLICH, F

MACLAUGHLIN, DE

KNETSCH, EA

HEFFNER, RH

机构：

[1] TH DARMSTADT,INST FESTKORPERPHYS,W-6100 DARMSTADT,GERMANY

[2] UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521

[3] LEIDEN UNIV,KAMERLINGH ONNES LAB,2300 RA LEIDEN,NETHERLANDS

[4] LOS ALAMOS NATL LAB,LOS ALAMOS,NM 87545

来源：

EUROPHYSICS LETTERS | 1992年 / 19卷 / 02期

关键词：

HEAVY-FERMION SUPERCONDUCTORS; VALENCE FLUCTUATIONS; KONDO LATTICE AND HEAVY FERMIONS; MUON SPIN ROTATION AND RELAXATION;

D O I：

10.1209/0295-5075/19/2/012

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Zero- and transverse-field muon-spin rotation (mu+ SR) spectroscopy, as well as critical-field investigations were performed on the newly discovered antiferromagnetic superconductor UPd2Al3. In contrast to the situation in UNi2Al3, no spontaneous frequency could be observed in the zero-field spectroscopy, suggesting a symmetric muon stopping site. The coexistence between magnetism and superconductivity could unambiguously be confirmed by the mu+ SR data. The magnetic-penetration depth lambda(0) has been obtained from the increase of the mu+ SR line width below T(c) and from the slopes of the critical field at T(c). The results are compatible with a value of lambda(0) = (6250 +/- 1250) A and suggest that UPd2Al3 is a BCS-type weak-coupling superconductor.

引用

页码：127 / 133

页数：7

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