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Effects of La substitution on superconducting state of CeCoIn5

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arxiv cond-mat/0204059 v1 pith:ADE3G6EZ submitted 2002-04-02 cond-mat.supr-con cond-mat.str-el

Effects of La substitution on superconducting state of CeCoIn5

C. Petrovic , S. L. Bud'ko , V. G. Kogan , P. C. Canfield This is my paper
classification cond-mat.supr-con cond-mat.str-el
keywords anisotropycecoin5criticaleffectsfieldstatesubstitutionsuperconducting
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We report effects of La substitution on superconducting state of 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 depression of Tc and indicates strong gap anisotropy. Upper critical field Hc2 values decrease with increased La concentration, but the critical field anisotropy, gamma=Hc2(a)/Hc2(c), does not change in the Ce_{1-x}La_xCoIn5 (x=0-0.15). The electronic system is in the clean limit for all values of x.

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