Physics – Condensed Matter – Superconductivity
Scientific paper
2007-02-22
Physics
Condensed Matter
Superconductivity
Scientific paper
We report a clear anomaly in the rf response of a tunnel-diode resonator measured in borocarbide crystals in dc fields along the $c-$axis. We associate the anomaly in the dynamic magnetic susceptibility, $\chi$, with a structural transition in the vortex lattice. $\chi$ is sensitive to the Campbell penetration depth $\lambda_{C}$ of the rf perturbation into the mixed state. $\lambda_{C}$ depends on the vortex lattice elastic moduli, which in turn depend on the vortex lattice structure. The high-field transition line is clearly mapped and shown to behave in agreement with theory.
Bud'ko Sergey L.
Canfield Paul. C.
Kogan Vladimir G.
Prozorov Ruslan
Vannette Matthew D.
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