Oxygen related ultrasonic attenuation and elastic anomalies in EuBa2Cu3O7-δ (δ∼0.02 and 0.45)

E. Marlianto, M. Yahya, Muhamad Mat Salleh, Roslan Abd. Shukor

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Ultrasonic shear velocity and attenuation measurements on superconducting (δ∼0.02) and non-superconducting (δ∼0.45) polycrystalline EuBa2Cu3O7-δ have been performed at 7-8 MHz between 80 K and 220 K. Enhanced attenuation and softening tendency was observed near 170 K in the superconducting material. The attenuation peak is greatly suppressed and no softening tendency was observed in the non-superconducting sample. The reduction of oxygen content from O6.98 to O6.55 caused the absolute shear velocity to decrease. The O6.98 sample showed a 2.25% change in shear velocity between 80 K and 220 K while the O6.55 sample showed a 3.75% change within the same temperature range. These anomalies are discussed in terms of possible oxygen ordering. The acoustic Debye temperature of the superconducting sample in the void-free approximation is estimated to be ΘD∼457 K.

Original languageEnglish
Pages (from-to)55-58
Number of pages4
JournalJournal of Alloys and Compounds
Volume274
Issue number1-2
Publication statusPublished - 26 Jun 1998

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Ultrasonics
Oxygen
Debye temperature
Superconducting materials
Acoustics
Temperature

Keywords

  • EuBaCuO
  • Shear sound velocity
  • Superconductor
  • Ultrasonic attenuation

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Oxygen related ultrasonic attenuation and elastic anomalies in EuBa2Cu3O7-δ (δ∼0.02 and 0.45). / Marlianto, E.; Yahya, M.; Mat Salleh, Muhamad; Abd. Shukor, Roslan.

In: Journal of Alloys and Compounds, Vol. 274, No. 1-2, 26.06.1998, p. 55-58.

Research output: Contribution to journalArticle

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