Abstract
We report ultrasonic attenuation measurements on sinter-forged YBa2Cu3O7- material, which differs from ordinary sintered material in that the crystallites are preferentially oriented to form a uniaxial sample. Three peaks in attenuation, at temperatures of 250, 180, and 70 K, were observed for longitudinal waves propagating perpendicular to the forging axis, which is similar to that reported in ordinary (isotropic) polycrystalline samples. However, for both transverse and longitudinal sound propagated along the forging axis we have a different behavior, with only one peak at 180 K, showing a strong anisotropy. It is suggested that sound waves traveling parallel to and normal to the Cu-O planes may account for the anisotropic effect, and a relaxation mechanism may explain the increase in shear wave attenuation which was seen with decreasing temperature.
| Original language | English |
|---|---|
| Pages (from-to) | 843-846 |
| 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 attenuation measurements in sinter-forged YBa2Cu3O7-. / Xu, M. F.; Bein, D.; Wiegert, R. F.; Sarma, Bimal K.; Levy, M.; Zhao, Z.; Adenwalla, S.; Moreau, A.; Robinson, Q.; Johnson, D. L.; Hwu, S. J.; Poeppelmeier, Kenneth R; Ketterson, J. B.
In: Physical Review B, Vol. 39, No. 1, 1989, p. 843-846.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Ultrasonic attenuation measurements in sinter-forged YBa2Cu3O7-
AU - Xu, M. F.
AU - Bein, D.
AU - Wiegert, R. F.
AU - Sarma, Bimal K.
AU - Levy, M.
AU - Zhao, Z.
AU - Adenwalla, S.
AU - Moreau, A.
AU - Robinson, Q.
AU - Johnson, D. L.
AU - Hwu, S. J.
AU - Poeppelmeier, Kenneth R
AU - Ketterson, J. B.
PY - 1989
Y1 - 1989
N2 - We report ultrasonic attenuation measurements on sinter-forged YBa2Cu3O7- material, which differs from ordinary sintered material in that the crystallites are preferentially oriented to form a uniaxial sample. Three peaks in attenuation, at temperatures of 250, 180, and 70 K, were observed for longitudinal waves propagating perpendicular to the forging axis, which is similar to that reported in ordinary (isotropic) polycrystalline samples. However, for both transverse and longitudinal sound propagated along the forging axis we have a different behavior, with only one peak at 180 K, showing a strong anisotropy. It is suggested that sound waves traveling parallel to and normal to the Cu-O planes may account for the anisotropic effect, and a relaxation mechanism may explain the increase in shear wave attenuation which was seen with decreasing temperature.
AB - We report ultrasonic attenuation measurements on sinter-forged YBa2Cu3O7- material, which differs from ordinary sintered material in that the crystallites are preferentially oriented to form a uniaxial sample. Three peaks in attenuation, at temperatures of 250, 180, and 70 K, were observed for longitudinal waves propagating perpendicular to the forging axis, which is similar to that reported in ordinary (isotropic) polycrystalline samples. However, for both transverse and longitudinal sound propagated along the forging axis we have a different behavior, with only one peak at 180 K, showing a strong anisotropy. It is suggested that sound waves traveling parallel to and normal to the Cu-O planes may account for the anisotropic effect, and a relaxation mechanism may explain the increase in shear wave attenuation which was seen with decreasing temperature.
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U2 - 10.1103/PhysRevB.39.843
DO - 10.1103/PhysRevB.39.843
M3 - Article
VL - 39
SP - 843
EP - 846
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 1
ER -