Magnetic penetration depth measurements of the heavy-fermion superconductor PrOS4Sb12

被引：0

作者：

Ozcan, S.

Yuhasz, W. M.

Frederick, N. A.

Maple, M. B.

机构：

[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[2] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[3] Univ Calif San Diego, Inst Pure & Appl Phys Sci, La Jolla, CA 92093 USA

来源：

PHYSICA B-CONDENSED MATTER | 2006年 / 378-80卷 / SPEC. ISS.期

基金：

美国国家科学基金会;

关键词：

PrOS4Sb12; superconductivity;

D O I：

10.1016/j.physb.2006.01.283

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Previous studies of the magnetic penetration depth in the heavy-fermion superconductor PrOs4Sb12 reported contradictory results about its pairing state. While muon spin rotation measurements report a fully gapped quasiparticle spectrum, inductive measurements at radio frequencies suggest the existence of point nodes in the energy gap. Here, we report on new measurements of the in-plane magnetic penetration depth of PrOs4Sb12,. The measurements were performed using a tunnel diode oscillator that exhibits excellent frequency stability and low-power dissipation. We report the first ever measurements of the penetration depth of this material at temperatures as low as 20 mK. At about 450 mK, we observe the onset of a superconducting-transition-like drop in the magnetic penetration depth. (c) 2006 Elsevier B.V. All rights reserved.

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页码：182 / 183

页数：2

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