Effect of anisotropic temperature factors on convergent-beam electron diffraction intensities and measurement of the local change in the oxygen concentration of YBa2Cu3Oy

Y. Tomokiyo, Y. Tanaka, D. Koga, Z. Akase

Research output: Contribution to journalArticle

Abstract

The local oxygen concentration of the high-Tc superconductor YBa2Cu3Oy, was measured from large-angle convergent-beam electron diffraction patterns using a transmission electron microscope equipped with a field emission gun with an in-column-type energy filter. The anisotropic effect of thermal vibrations of atoms was considered in the analysis of the oxygen concentration, based on the many-beam dynamic theory. The observed fluctuation in the oxygen concentration can explain the peak effect in the Jc-H curve, the critical current density Jc plotted as a function of applied magnetic field H.

Original languageEnglish
Pages (from-to)2809-2818
Number of pages10
JournalPhilosophical Magazine
Volume84
Issue number25-26
DOIs
Publication statusPublished - 2004 Sep 1

ASJC Scopus subject areas

  • Condensed Matter Physics

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