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Anomalous Superconducting Properties and Field Induced Magnetism in CeCoIn5

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arxiv cond-mat/0104179 v2 pith:TSX3LXEZ submitted 2001-04-10 cond-mat.str-el cond-mat.supr-con

T. P. Murphy , Donavan Hall , E. C. Palm , S. W. Tozer , C. Petrovic , Z. Fisk , R. G. Goodrich , P. G. Pagliuso
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J. L. Sarrao J. D. Thompson
This is my paper · ORCID
classification cond-mat.str-elcond-mat.supr-con
keywords cecoin5fieldplaneanisotropycriticallargeobservedsuggest
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In the heavy fermion superconductor CeCoIn5 (Tc=2.3K) the critical field is large, anisotropic and displays hysteresis. The magnitude of the critical-field anisotropy in the a-c plane can be as large as 70 kOe and depends on orientation. Critical field measurements in the (110) plane suggest 2D superconductivity, whereas conventional effective mass anisotropy is observed in the (100) plane. Two distinct field-induced magnetic phases are observed: Ha appears deep in the superconducting phase, while Hb intersects Hc2 at T=1.4 K and extends well above Tc. These observations suggest the possible realization of a direct transition from ferromagnetism to Fulde-Ferrel-Larkin-Ovchinnikov superconductivity in CeCoIn5.

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