Ultrasonic study of oxygen related structures in Nd123 between 80 and 400 K

A. R. Anderson, M. Murakami, N. Chikumoto, G. J. Russell

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Abstract

This paper reports on an ultrasonic study at 130 kHz region in melt-textured Nd123, i.e. NdBa2Cu3O7-δ with different oxygen levels, i.e. δ = 0, 0.2, 0.4, 0.6, 1. Three ultrasonic attenuation peaks were identified, which were related to oxygen levels in the material. An ultrasonic attenuation peak in the 360 K region was found at higher oxygen levels, i.e. δ = 0.2, 0.4, and appeared to be a characteristic of the orthorhombic phase of the material. An ultrasonic attenuation peak in the 160 K region occurred at lower oxygen levels, i.e. δ = 0.4, 0.6, while a peak close to 320 K was found in deoxygenated Nd123. All ultrasonic attenuation peaks showed the characteristics of structural changes. This proposal is supported by ultrasonic velocity measurements which displayed discontinuities at the corresponding temperatures.

Original languageEnglish
Pages (from-to)69-73
Number of pages5
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume65
Issue number1
DOIs
Publication statusPublished - 1999 Oct 29

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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