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Comment on "Pronounced Enhancement of the Lower Critical Field and Critical Current Deep in the Superconducting State of PrOs4Sb12"

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arxiv 1006.0460 v1 pith:P2Q3SF4R submitted 2010-06-02 cond-mat.supr-con cond-mat.str-el

Comment on "Pronounced Enhancement of the Lower Critical Field and Critical Current Deep in the Superconducting State of PrOs4Sb12"

D. E. MacLaughlin , A. D. Hillier , J. M. Mackie , Lei Shu , Y. Aoki , D. Kikuchi , H. Sato , Y. Tunashima
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H. Sugawara
This is my paper
classification cond-mat.supr-con cond-mat.str-el
keywords criticalpros4sb12superconductingtransitioncurrentfieldlowernear
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Cichorek et al. [Phys. Rev. Lett. 94, 107002 (2005)] reported enhancements of the lower critical field Hc1(T) and critical current in superconducting PrOs4Sb12 below a transition temperature Tc3 ~ 0.6 K, and speculated that this reflects a transition between superconducting phases. Features have been observed near Tc3 in other properties, but not in the specific heat. We report muon spin rotation measurements of the penetration depth in the vortex state of PrOs4Sb12 near Hc1(T), that to high accuracy exhibit no anomaly Tc3 and therefore cast doubt on the putative phase transition.

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