Title
Enhancement of ferromagnetism by p-wave Cooper pairing in superconducting ferromagnets
Abbreviated Journal Title
Phys. Rev. B
Keywords
Cooper pairs; Curie temperature; exchange interactions (electron); ferromagnetic materials; magnetic superconductors; magnetisation; specific heat; spin fluctuations; spin Hamiltonians; superconducting; transition temperature; weak ferromagnetism; SPIN CORRELATIONS; COEXISTENCE; SYMMETRY; FIELD; METALS; MODEL; URHGE; STATE; UPT3; Physics, Condensed Matter
Abstract
In superconducting ferromagnets for which the Curie temperature T(m) exceeds the superconducting transition temperature T(c), it was suggested that ferromagnetic spin fluctuations could lead to superconductivity with p-wave spin-triplet Cooper pairing. Using the Stoner model of itinerant ferromagnetism, we study the feedback effect of the p-wave superconductivity on the ferromagnetism. Below T(c), the ferromagnetism is enhanced by the p-wave superconductivity. At zero temperature, the critical exchange interaction value for itinerant ferromagnetism is reduced by the strength of the p-wave pairing potential, and the magnetization increases correspondingly. More important, our results suggest that once the ferromagnetism is established, T(m) is unlikely to ever be below T(c). For strong and weak ferromagnetism, three and two peaks in the temperature dependence of the specific heat are, respectively, predicted, the upper peak in the latter case corresponding to a first-order transition.
Journal Title
Physical Review B
Volume
80
Issue/Number
22
Publication Date
1-1-2009
Document Type
Article
Language
English
First Page
7
WOS Identifier
ISSN
1098-0121
Recommended Citation
"Enhancement of ferromagnetism by p-wave Cooper pairing in superconducting ferromagnets" (2009). Faculty Bibliography 2000s. 1668.
https://stars.library.ucf.edu/facultybib2000/1668
Comments
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