mu(+) SR studies of magnetic properties of boron carbide superconductors

被引：19

作者：

Le, L. P. ^{[1
]}

Heffner, R. H. ^{[1
]}

Nieuwenhuys, G. J. ^{[2
]}

Canfield, P. C. ^{[3
]}

Cho, B. K. ^{[3
]}

Amato, A. ^{[4
]}

Feyerherm, R. ^{[4
]}

Gygax, F. N. ^{[4
]}

MacLaughlin, D. E. ^{[5
]}

Schenck, A. ^{[4
]}

机构：

[1] Los Alamos Natl Lab, Mat Div, MS L764, Los Alamos, NM 87545 USA

[2] Leiden Univ, Kamerlingh Onnes Lab, NL-2300 RA Leiden, Netherlands

[3] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

[4] ETH Zurich, IMP, CH-5232 Villigen, Switzerland

[5] Univ Calif Riverside, Riverside, CA 92521 USA

来源：

PHYSICA B-CONDENSED MATTER | 1995年 / 206卷

关键词：

D O I：

10.1016/0921-4526(94)00516-X

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Positive-muon spin relaxation (mu+SR) has been carried out in the recently discovered rare-earth boron carbide superconductors RNi2B2C, R = Ho, Er and Tm. For R = Ho and Er zero-field mu(+) SR measurements showed a well-defined internal field below the Neel temperatures of 5.5 K coexisting with the superconducting state down to 0.1 K. The observed temperature dependence of the order parameter for Ho is consistent with a 2-dimensional Ising model. For R = Tm a spontaneous internal field appears above 30 K, whose magnitude saturates below about 3 K at a value corresponding to a rare earth moment much smaller than for Ho and Er. Transverse-field mu(+) SR measurements in R = Tm showed a superconducting penetration depth lambda = 1200 angstrom. The temperature dependence of A is consistent with conventional s-wave pairing.

引用

页码：552 / 554

页数：3

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