Effects of La substitution on superconducting state of CeCoIn5

Details Effects of La substitution on superconducting state of CeCoIn5 Effects of La substitution on superconducting state of CeCoIn5

2002-04-02

arxiv.org/abs/cond-mat/0204059v1

Physics

Condensed Matter

Superconductivity

Submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.66.054534

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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