Elastic constant anomalies in sinter-forged high-Tc superconductor YBa2Cu3O7 - δ

Z. Zhao, S. Adenwalla, A. Moreau, J. B. Ketterson, Q. Robinson, D. L. Johnson, S. J. Hwu, Kenneth R Poeppelmeier, M. F. Xu, Y. Hong, M. Levy, Bimal K. Sarma

Research output: Contribution to journalArticle

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Abstract

The ultrasound velocity in the sinter-forged YBa2Cu3O7 - δ superconductor was measured and the results showed evident anomalies as well as anisotropies. Both longitudinal and shear wave velocity along the c axis (the forging axis) showed a distinct thermal hysteresis from 65 K to 260 K. The velocity change ΔV V from room temperature to 4 K was 1.5%. The sound velocity along the "basal plane" reached a maximum around 160 K. No distinct thermal hysteresis was observed. ΔV V from room temperature to 4 K was 1%. All of these velocities were measured while sweeping the magnetic field up to 9 T at fixed temperatures of 4 K and 86 K respectively. No velocity change was observed. The shear wave velocity behaved similarly at 9 T during the thermal cycling between room temperature and 4 K.

Original languageEnglish
Pages (from-to)451-454
Number of pages4
JournalJournal of the Less-Common Metals
Volume149
Issue numberC
DOIs
Publication statusPublished - Apr 15 1989

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Elastic constants
Superconducting materials
Shear waves
Hysteresis
Temperature
Acoustic wave velocity
Thermal cycling
Forging
barium copper yttrium oxide
Anisotropy
Ultrasonics
Magnetic fields

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Zhao, Z., Adenwalla, S., Moreau, A., Ketterson, J. B., Robinson, Q., Johnson, D. L., ... Sarma, B. K. (1989). Elastic constant anomalies in sinter-forged high-Tc superconductor YBa2Cu3O7 - δ. Journal of the Less-Common Metals, 149(C), 451-454. https://doi.org/10.1016/0022-5088(89)90522-5

Elastic constant anomalies in sinter-forged high-Tc superconductor YBa2Cu3O7 - δ. / Zhao, Z.; Adenwalla, S.; Moreau, A.; Ketterson, J. B.; Robinson, Q.; Johnson, D. L.; Hwu, S. J.; Poeppelmeier, Kenneth R; Xu, M. F.; Hong, Y.; Levy, M.; Sarma, Bimal K.

In: Journal of the Less-Common Metals, Vol. 149, No. C, 15.04.1989, p. 451-454.

Research output: Contribution to journalArticle

Zhao, Z, Adenwalla, S, Moreau, A, Ketterson, JB, Robinson, Q, Johnson, DL, Hwu, SJ, Poeppelmeier, KR, Xu, MF, Hong, Y, Levy, M & Sarma, BK 1989, 'Elastic constant anomalies in sinter-forged high-Tc superconductor YBa2Cu3O7 - δ', Journal of the Less-Common Metals, vol. 149, no. C, pp. 451-454. https://doi.org/10.1016/0022-5088(89)90522-5
Zhao Z, Adenwalla S, Moreau A, Ketterson JB, Robinson Q, Johnson DL et al. Elastic constant anomalies in sinter-forged high-Tc superconductor YBa2Cu3O7 - δ. Journal of the Less-Common Metals. 1989 Apr 15;149(C):451-454. https://doi.org/10.1016/0022-5088(89)90522-5
Zhao, Z. ; Adenwalla, S. ; Moreau, A. ; Ketterson, J. B. ; Robinson, Q. ; Johnson, D. L. ; Hwu, S. J. ; Poeppelmeier, Kenneth R ; Xu, M. F. ; Hong, Y. ; Levy, M. ; Sarma, Bimal K. / Elastic constant anomalies in sinter-forged high-Tc superconductor YBa2Cu3O7 - δ. In: Journal of the Less-Common Metals. 1989 ; Vol. 149, No. C. pp. 451-454.
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abstract = "The ultrasound velocity in the sinter-forged YBa2Cu3O7 - δ superconductor was measured and the results showed evident anomalies as well as anisotropies. Both longitudinal and shear wave velocity along the c axis (the forging axis) showed a distinct thermal hysteresis from 65 K to 260 K. The velocity change ΔV V from room temperature to 4 K was 1.5{\%}. The sound velocity along the {"}basal plane{"} reached a maximum around 160 K. No distinct thermal hysteresis was observed. ΔV V from room temperature to 4 K was 1{\%}. All of these velocities were measured while sweeping the magnetic field up to 9 T at fixed temperatures of 4 K and 86 K respectively. No velocity change was observed. The shear wave velocity behaved similarly at 9 T during the thermal cycling between room temperature and 4 K.",
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AU - Ketterson, J. B.

AU - Robinson, Q.

AU - Johnson, D. L.

AU - Hwu, S. J.

AU - Poeppelmeier, Kenneth R

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AU - Hong, Y.

AU - Levy, M.

AU - Sarma, Bimal K.

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