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.
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收藏
页码：127 / 133
页数：7
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