Upper critical fields well above 100 T for the superconductor SmFeAsO$_{0.85}$F$_{0.15}$ with T$_c$ = 46 K

C. Senatore; M. Cantoni; G. Wu; R. H. Liu; X. H. Chen; R. Flukiger

doi:10.1103/PhysRevB.78.054514

paper

Upper critical fields well above 100 T for the superconductor SmFeAsO $_{0.85}$ F $_{0.15}$ with T $_{c}$ = 46 K

arXiv:0805.2389 · doi:10.1103/PhysRevB.78.054514

Abstract

We report specific heat measurements at magnetic fields up to 20 T on the recently discovered superconductor SmFeAsO $_{0.85}$ F $_{0.15}$ . The B-T diagram of a polycrystalline SmFeAsO $_{0.85}$ F $_{0.15}$ sample with T $_{c}$ = 46 K was investigated. The temperature dependence of B $_{c 2}$ was extracted from the specific heat curves, the corresponding B $_{c 2}$ (T = 0) value derived from the Werthamer-Helfand-Hohenberg formula being 150 T. Based on magnetization measurements up to 9 T, a first estimation of the field dependence of the inductive critical current J $_{c}$ is given. Evidence for granularity is found. The presence of a peak effect is reported, suggesting a crossover in the vortex dynamics, in analogy to the behaviour observed in high T $_{c}$ cuprates.

Accepted for publication in Physical Review B

Upper critical fields well above 100 T for the superconductor SmFeAsO $_{0.85}$ F $_{0.15}$ with T $_{c}$ = 46 K

Abstract

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Upper critical fields well above 100 T for the superconductor SmFeAsO0.85​F0.15​ with Tc​ = 46 K

Abstract

References in corpus (21)

Cited by in corpus (28)

Upper critical fields well above 100 T for the superconductor SmFeAsO $_{0.85}$ F $_{0.15}$ with T $_{c}$ = 46 K