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Published on: March 24, 2019
Exploring the fragile antiferromagnetic superconducting phase in CeCoIn5.
E Blackburn1, P Das, M R Eskildsen
1School of Physics and Astronomy, University of Birmingham, B15 2TT, United Kingdom.
Physical Review Letters
|January 15, 2011
Summary
CeCoIn5, a heavy fermion superconductor, exhibits Pauli-limited superconductivity. High magnetic fields induce a transition, revealing antiferromagnetic order perpendicular to the c axis, distinct from parallel field anomalies.
Area of Science:
- Condensed Matter Physics
- Quantum Materials Science
Background:
- CeCoIn5 is a well-studied heavy fermion superconductor.
- It exhibits type-II superconductivity with characteristics of Pauli-limited behavior.
Purpose of the Study:
- Investigate the high-field phase transitions in CeCoIn5.
- Determine the nature of magnetic order within the superconducting state.
Main Methods:
- Utilized various measurements to probe the superconducting state under high magnetic fields.
- Applied magnetic fields parallel and perpendicular to the c-axis.
Main Results:
- Observed a transition within the superconducting state at high magnetic fields.
- Antiferromagnetic order emerged on the high-field side when the field was perpendicular to the c-axis.
- This magnetic order persisted upon rotating the field, but the moment vanished above 17°.
Conclusions:
- The high-field anomalies observed with the field parallel to the c-axis are not linked to the observed antiferromagnetic order.
- This finding provides crucial insights into the complex interplay between superconductivity and magnetism in heavy fermion systems.
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