Evidence for a new magnetic field scale in CeCoIn5
I. Sheikin, H. Jin, R. Bel, K. Behnia, C. Proust, J. Flouquet, Y., Matsuda, D. Aoki, Y. Onuki
TL;DR
This paper reports a new magnetic field scale in CeCoIn5 marked by anomalies in the Nernst coefficient and changes in Fermi surface properties, suggesting a possible metamagnetic transition.
Contribution
It provides evidence for a new magnetic field scale in CeCoIn5 through transport and quantum oscillation measurements, indicating a Fermi surface modification.
Findings
Anomaly in Nernst coefficient at ~23 T
Observation of new de Haas-van Alphen frequencies above 23 T
Possible Fermi surface change at the new magnetic field scale
Abstract
The Nernst coefficient of CeCoIn5 displays a distinct anomaly at H_K ~ 23 T. This feature is reminiscent of what is observed at 7.8 T in CeRu2Si2, a well-established case of metamagnetic transition. New frequencies are observed in de Haas-van Alphen oscillations when the field exceeds 23 T, which may indicate a modification of the Fermi surface at this field.
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Taxonomy
TopicsRare-earth and actinide compounds · Quasicrystal Structures and Properties · Metallurgical and Alloy Processes