Evidence of upper-critical-field enhancement in K3C60 powders

G. S. Boebinger*, T. T .M. Palstra, A. Passner, M. J. Rosseinsky, D. W. Murphy, I. I. Mazin

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

51 Citations (Scopus)
2 Downloads (Pure)

Abstract

ac susceptibility measurements of superconducting K3C60 powders in magnetic fields to 30 T yield a roughly linear Hc2(T) curve extending up to the highest experimental fields. Samples prepared by two different methods give -dHc2/dT=2.14±0.08 T/K, with Tc=18.7 K. The observed Hc2 at low temperatures exceeds the Hc2(T) curve from the standard theory by Werthamer-Helfand-Hohenberg. We discuss the role of flux motion and evidence for enhancement of Hc2 by intrinsic mechanisms such as strong coupling, Fermi surface anisotropy, and/or granularity of the samples.

Original languageEnglish
Pages (from-to)5876-5879
Number of pages4
JournalPhysical Review B
Volume46
Issue number9
DOIs
Publication statusPublished - 1 Jan 1992
Externally publishedYes

Fingerprint Dive into the research topics of 'Evidence of upper-critical-field enhancement in K3C60 powders'. Together they form a unique fingerprint.

  • Cite this

    Boebinger, G. S., Palstra, T. T. . M., Passner, A., Rosseinsky, M. J., Murphy, D. W., & Mazin, I. I. (1992). Evidence of upper-critical-field enhancement in K3C60 powders. Physical Review B, 46(9), 5876-5879. https://doi.org/10.1103/PhysRevB.46.5876