Physics
Abrikosov-to-Josephson vortex lattice crossover in heavy fermion CeCoIn5
Document Type
Article
Abstract
We present torque magnetization measurements on the quasi-2D heavy fermion superconductor CeCoIn 5 at temperatures down to 20 mK and magnetic fields up to 18T. At orientations with the magnetic field perpendicular to the conducting planes, a prominent vortex lattice peak effect is present at around 0.5 H c2 . The peak effect gradually disappears upon rotating the field into the plane parallel orientation. We interpret the absence of the peak effect for the plane parallel case as a transformation of the Abrikosov lattice into a Josephson vortex state, favored by the Pauli paramagnetic limit in CeCoIn 5 together with the unusually large condensation energy. Additionally, we do not observe flux avalanches as found in organic superconductors and suggest that the complete absence of vortex activity in the plane parallel field orientation is crucial for the formation of Fulde-Ferrell-Larkin-Ovchinnikov superconductivity in CeCoIn 5 .
Publication Title
Philosophical Magazine
Publication Date
8-11-2006
Volume
86
Issue
23
First Page
3569
Last Page
3579
ISSN
1478-6435
DOI
10.1080/14786430600672703
Keywords
magnetic fields, superconductivity
Repository Citation
Radovan, H. A.; Murphy, T. P.; Palm, E. C.; Tozer, S. W.; Cooley, J. C.; Mihut, I.; and Agosta, C. C., "Abrikosov-to-Josephson vortex lattice crossover in heavy fermion CeCoIn5" (2006). Physics. 28.
https://commons.clarku.edu/faculty_physics/28
