Anomalous Flux Pinning in ?-Pyrochlore Oxide Superconductor KOs2O6
Zenji Hiroi, Shigeki Yonezawa
TL;DR
This study investigates the flux pinning behavior in the ?-pyrochlore oxide superconductor KOs2O6, revealing anisotropic flux pinning linked to its crystal structure through resistivity measurements under magnetic fields.
Contribution
It uncovers an intrinsic flux pinning mechanism in KOs2O6 related to its unique crystal structure, with anisotropic flux pinning effects observed.
Findings
Reentrant superconductivity behavior near Tc in low magnetic fields.
Flux pinning is enhanced along specific crystallographic directions.
An intrinsic pinning mechanism is suggested from the crystal structure.
Abstract
The superconducting transition of the ?-pyrochlore oxide KOs2O6 with Tc = 9.60 K is studied by resistivity measurements under various magnetic fields using a high-quality single crystal. The reentrant behavior of superconductivity is observed near Tc in low magnetic fields below 2 T. The recovered resistance probably due to flux flow exhibits an anomalous angle dependence, indicating that flux pinning is enhanced in magnetic fields along certain crystallographic directions such as [110], [001] and [112]. It is suggested that there is an intrinsic pinning mechanism coming from the specific crystal structure of the ?-pyrochlore oxide.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.