Vortex glass melting in single crystal La1.825 Sr0.075CuO4

J. A. Herbsommer, J. Luzuriaga, S. W. Cheong

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Abstract

The vortex phase diagram in single crystalline La1.85Sr0.075CuO4 has been studied using an AC-susceptibility technique. A peak in the out-of-phase (x″) component of the susceptibility indicates a transition from a pinned flux lattice (FLL) to an unpinned one. This peak is frequency dependent for all the values of the magnetic field measured (0.01 to 4 T), and this, as well as the general behavior found in the cuprates, has prompted us to interpret our data as evidence for a vortex-glass to liquid transition in the FLL. The activation energies obtained can be fitted to a theory developed by Vinokur et al. Measurements with the magnetic field at an angle with the Cu-O planes may also be understood qualitatively within this framework.

Original languageEnglish (US)
Pages (from-to)169-174
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume258
Issue number1-2
DOIs
StatePublished - Feb 10 1996

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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