Penetration Depths of Antiferromagnetic Superconductors SmRh4B4 and NdRh4B4

Document Type

Article

Publication Date

2-1-1988

Abstract

We have investigated the surface impedance penetration depth, ⋀, both experimentally and theoretically of two antiferromagnetic superconductors, SmRh4B4 and NdRh4B4 which exhibit quite different temperature dependencies of the upper critical field arising from two different mechanisms of the modification of the superconductivity by the presence of the antiferromagnetism: the antiferromagnetic molecular field effect and the spin-fluctuation effect. It has been shown the importance of the fluctuation effect for SmRh4B4 (⋀−1 increases more rapidly below TN) in contrast to NdRh4B4 where the molecular field effect is more significant (⋀−1 decreases below TN).

DOI

10.1016/0038-1098(88)90529-7

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