Anomalous He-gas high-pressure studies on superconducting LaO 1-xFxFeAs

W. Bi, H. B. Banks, J. S. Schilling, H. Takahashi, H. Okada, Y. Kamihara, M. Hirano, H. Hosono

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6 Citations (Scopus)

Abstract

Ac susceptibility measurements have been carried out on superconducting LaO1-xFxFeAs for x = 0.07 and 0.14 under He-gas pressures to ∼0.8 GPa. Not only do the measured values of dTc/dP differ substantially from those obtained in previous studies using other pressure media, but also the Tc(P) dependences observed depend on the detailed pressure/temperature history of the sample. A sizeable sensitivity of T c(P) to shear stresses provides a possible explanation.

Original languageEnglish
Article number023005
JournalNew Journal of Physics
Volume12
DOIs
Publication statusPublished - 2010 Feb 9
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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