Effects of La substitution on the superconducting state of CeCoIn5

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2002-08-01
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Petrovic, C.
Bud'ko, Sergey L.
Kogan, V. G.
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American Physical Society
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Canfield, Paul
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We report the effects of La substitution on the superconducting state of the heavy-fermion superconductor CeCoIn5, as seen in transport and magnetization measurements. As opposed to the case of conventional superconductors, pair breaking by nonmagnetic La results in the depression of T-c and indicates a strong gap anisotropy. The upper critical field H-c2 values decrease with increased La concentration, but the critical field anisotropy, gamma=H-c2(a)/H-c2(c), does not change in Ce1-xLaxCoIn5 (x=0-0.15). The electronic system is in the clean limit for all values of x.
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This article is published as Petrovic, C., S. L. Bud’ko, V. G. Kogan, and P. C. Canfield. "Effects of La substitution on the superconducting state of CeCoIn 5." Physical Review B 66, no. 5 (2002): 054534. DOI: 10.1103/PhysRevB.66.054534. Copyright 2002 American Physical Society. Posted with permission.
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