Abstract
The velocity of ultrasound was measured on sinter-forged polycrystalline YBa2Cu3O7- samples with a superconducting transition temperature of 91 K. The forging process results in crystallites which are preferentially aligned with their c axis aligned parallel to the forging axis as confirmed from optical and x-ray measurements. Sound-velocity measurements show that the material is elastically anisotropic. The temperature dependence of the sound velocity shows distinct anomalies. For propagation parallel to the forging axis, both longitudinal and shear waves displayed a thermal hysteresis between 65 and 260 K; however the longitudinal sound velocity with q^ in the basal plane showed a much smaller thermal hysteresis. No effect of a magnetic field was observed on sweeping the magnetic field to 7.2 T at temperatures of 4 and 86 K.
| Original language | English |
|---|---|
| Pages (from-to) | 721-724 |
| Number of pages | 4 |
| Journal | Physical Review B |
| Volume | 39 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1989 |
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ASJC Scopus subject areas
- Condensed Matter Physics
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Ultrasonic velocity anomalies in superconducting sinter-forged YBa2Cu3O7-. / 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.; Wiegert, R. F.; Levy, M.; Sarma, Bimal K.
In: Physical Review B, Vol. 39, No. 1, 1989, p. 721-724.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultrasonic velocity anomalies in superconducting sinter-forged YBa2Cu3O7-
AU - Zhao, Z.
AU - Adenwalla, S.
AU - Moreau, A.
AU - Ketterson, J. B.
AU - Robinson, Q.
AU - Johnson, D. L.
AU - Hwu, S. J.
AU - Poeppelmeier, Kenneth R
AU - Xu, M. F.
AU - Hong, Y.
AU - Wiegert, R. F.
AU - Levy, M.
AU - Sarma, Bimal K.
PY - 1989
Y1 - 1989
N2 - The velocity of ultrasound was measured on sinter-forged polycrystalline YBa2Cu3O7- samples with a superconducting transition temperature of 91 K. The forging process results in crystallites which are preferentially aligned with their c axis aligned parallel to the forging axis as confirmed from optical and x-ray measurements. Sound-velocity measurements show that the material is elastically anisotropic. The temperature dependence of the sound velocity shows distinct anomalies. For propagation parallel to the forging axis, both longitudinal and shear waves displayed a thermal hysteresis between 65 and 260 K; however the longitudinal sound velocity with q^ in the basal plane showed a much smaller thermal hysteresis. No effect of a magnetic field was observed on sweeping the magnetic field to 7.2 T at temperatures of 4 and 86 K.
AB - The velocity of ultrasound was measured on sinter-forged polycrystalline YBa2Cu3O7- samples with a superconducting transition temperature of 91 K. The forging process results in crystallites which are preferentially aligned with their c axis aligned parallel to the forging axis as confirmed from optical and x-ray measurements. Sound-velocity measurements show that the material is elastically anisotropic. The temperature dependence of the sound velocity shows distinct anomalies. For propagation parallel to the forging axis, both longitudinal and shear waves displayed a thermal hysteresis between 65 and 260 K; however the longitudinal sound velocity with q^ in the basal plane showed a much smaller thermal hysteresis. No effect of a magnetic field was observed on sweeping the magnetic field to 7.2 T at temperatures of 4 and 86 K.
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U2 - 10.1103/PhysRevB.39.721
DO - 10.1103/PhysRevB.39.721
M3 - Article
VL - 39
SP - 721
EP - 724
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 1
ER -