Anomalous superconductivity and field-induced magnetism in CeCoIn 5
Anomalous superconductivity and field-induced magnetism in CeCoIn 5
复制标题
CeCoIn 5 中的反常超导性和场感磁性
DOI：
10.1103/physrevb.65.100514
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
J. Thompson
中科院分区：
文献类型：
--
作者：
T. Murphy;D. Hall;E. Palm;S. Tozer;C. Petrovic;Z. Fisk;R. Goodrich;P. G. Pagliuso;J. Sarrao;J. Thompson
In the heavy fermion superconductor ${\mathrm{CeCoIn}}_{5}$ ${(T}_{c}=2.3 \mathrm{K})$ the critical field is large, anisotropic, and displays hysteresis. The magnitude of the critical-field anisotropy in the $a\ensuremath{-}c$ plane can be as large as 7 T and depends on orientation. Critical-field measurements in the (110) plane suggest two-dimensional superconductivity, whereas conventional effective-mass anisotropy is observed in the (100) plane. Two distinct field-induced magnetic phases are observed: ${H}_{a}$ appears deep in the superconducting phase, while ${H}_{b}$ intersects ${\mathrm{Hc}}_{2}$ at $T=1.4 \mathrm{K}$ and extends well above ${T}_{c}.$ These observations suggest the possible realization of a direct transition from ferromagnetism to Fulde-Ferrel-Larkin-Ovchinnikov superconductivity in ${\mathrm{CeCoIn}}_{5}.$
In the heavy fermion superconductor ${\mathrm{CeCoIn}}_{5}$ ${(T}_{c}=2.3 \mathrm{K})$ the critical field is large, anisotropic, and displays hysteresis. The magnitude of the critical-field anisotropy in the $a\ensuremath{-}c$ plane can be as large as 7 T and depends on orientation. Critical-field measurements in the (110) plane suggest two-dimensional superconductivity, whereas conventional effective-mass anisotropy is observed in the (100) plane. Two distinct field-induced magnetic phases are observed: ${H}_{a}$ appears deep in the superconducting phase, while ${H}_{b}$ intersects ${\mathrm{Hc}}_{2}$ at $T=1.4 \mathrm{K}$ and extends well above ${T}_{c}.$ These observations suggest the possible realization of a direct transition from ferromagnetism to Fulde-Ferrel-Larkin-Ovchinnikov superconductivity in ${\mathrm{CeCoIn}}_{5}.$