Ultrasonic attenuation anomalies of n -type superconductor Pr2 -x Cex CuO4

Tet Vui Chong, Roslan Abd. Shukor

Research output: Contribution to journalArticle

Abstract

Pr2-xCexCuO4 (x = 0 and 0.15) samples were prepared via solid state reaction. Pr2CuO4 sample is insulating while Pr1.85Ce0.15CuO4 sample exhibited an onset critical temperature, Tc of 21 K. The temperature dependences of ultrasonic attenuation in these polycrystalline n-type superconductor Pr2-xCexCuO4 (x = 0 and 0.15) samples have been measured between 80 K and 300 K using longitudinal and shear waves by pulse-echo-overlap method with frequencies between 5 MHz and 10 MHz. For the longitudinal mode, a pronounced attenuation peak around 200 K was observed in Pr2CuO4, but it is not observed in the superconducting material Pr1.85Ce0.15CuO4. For the shear mode, no pronounced attenuation peaks were observed in the samples. It is suggested that the attenuation peak in the x = 0 sample at 200 K is due to the weak structural distortion induced by the magnetic transition.

Original languageEnglish
Article number1650314
JournalModern Physics Letters B
Volume30
Issue number23
DOIs
Publication statusPublished - 30 Aug 2016

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ultrasonics
attenuation
anomalies
longitudinal waves
S waves
echoes
critical temperature
shear
solid state
temperature dependence
pulses

Keywords

  • n -type superconductor
  • ultrasonic attenuation
  • Ultrasonic velocity

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

Cite this

Ultrasonic attenuation anomalies of n -type superconductor Pr2 -x Cex CuO4 . / Chong, Tet Vui; Abd. Shukor, Roslan.

In: Modern Physics Letters B, Vol. 30, No. 23, 1650314, 30.08.2016.

Research output: Contribution to journalArticle

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N2 - Pr2-xCexCuO4 (x = 0 and 0.15) samples were prepared via solid state reaction. Pr2CuO4 sample is insulating while Pr1.85Ce0.15CuO4 sample exhibited an onset critical temperature, Tc of 21 K. The temperature dependences of ultrasonic attenuation in these polycrystalline n-type superconductor Pr2-xCexCuO4 (x = 0 and 0.15) samples have been measured between 80 K and 300 K using longitudinal and shear waves by pulse-echo-overlap method with frequencies between 5 MHz and 10 MHz. For the longitudinal mode, a pronounced attenuation peak around 200 K was observed in Pr2CuO4, but it is not observed in the superconducting material Pr1.85Ce0.15CuO4. For the shear mode, no pronounced attenuation peaks were observed in the samples. It is suggested that the attenuation peak in the x = 0 sample at 200 K is due to the weak structural distortion induced by the magnetic transition.

AB - Pr2-xCexCuO4 (x = 0 and 0.15) samples were prepared via solid state reaction. Pr2CuO4 sample is insulating while Pr1.85Ce0.15CuO4 sample exhibited an onset critical temperature, Tc of 21 K. The temperature dependences of ultrasonic attenuation in these polycrystalline n-type superconductor Pr2-xCexCuO4 (x = 0 and 0.15) samples have been measured between 80 K and 300 K using longitudinal and shear waves by pulse-echo-overlap method with frequencies between 5 MHz and 10 MHz. For the longitudinal mode, a pronounced attenuation peak around 200 K was observed in Pr2CuO4, but it is not observed in the superconducting material Pr1.85Ce0.15CuO4. For the shear mode, no pronounced attenuation peaks were observed in the samples. It is suggested that the attenuation peak in the x = 0 sample at 200 K is due to the weak structural distortion induced by the magnetic transition.

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