Effects of oxygen removal on ultrasonic attenuation and elastic behaviour of PrBa2Cu3Ox

A. K. Yahya, Roslan Abd. Shukor

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This paper reports ultrasonic longitudinal and shear attenuation measurements performed on non-superconducting PrBa2Cu3Ox (x = 6.5 and 6.9) between 80 and 300 K. Longitudinal attenuation profile for orthorhombic PrBa2Cu3O6.9 showed attenuation peaks around 185, 205 and 240 K. No attenuation peaks were observed for tetragonal PrBa2Cu3O6.5 in the longitudinal mode. Shear attenuation in PrBa2Cu3O6.5 showed a broad attenuation peak centred around 140 K. The longitudinal attenuation peaks in PrBa2Cu3O6.9 are oxygen-related and are explained in relation to a possible phase transition involving oxygen ordering. In addition, we also report the longitudinal and shear attenuation and velocity measurements on pseudo-tetragonal PrBa2Cu3O6.6. A strong stiffening tendency was observed upon cooling from 270 to 220 K for the longitudinal mode. A thermally anelastic relaxation process involving oxygen hopping was suggested to cause the large change in velocity.

Original languageEnglish
Pages (from-to)302-306
Number of pages5
JournalSuperconductor Science and Technology
Volume15
Issue number3
DOIs
Publication statusPublished - Mar 2002

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ultrasonics
Ultrasonics
attenuation
Oxygen
oxygen
Anelastic relaxation
Relaxation processes
Velocity measurement
shear
Phase transitions
Cooling
stiffening
velocity measurement
tendencies
cooling
causes
profiles

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Effects of oxygen removal on ultrasonic attenuation and elastic behaviour of PrBa2Cu3Ox . / Yahya, A. K.; Abd. Shukor, Roslan.

In: Superconductor Science and Technology, Vol. 15, No. 3, 03.2002, p. 302-306.

Research output: Contribution to journalArticle

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