Ultrasonic attenuation measurements in sinter-forged YBa2Cu3O7−δ

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DOI	Resolve DOI: https://doi.org/10.1103/PhysRevB.39.843
Author	Search for: Xu, M.-F.; Search for: Bein, D.; Search for: Wiegert, R.F.; Search for: Sarma, Bimal K.; Search for: Levy, M.; Search for: Zhao, Z.; Search for: Adenwalla, S.; Search for: Moreau, A.; Search for: Robinson, Q.; Search for: Johnson, D.L.; Search for: Hwu, S.-J.; Search for: Poeppelmeier, K.R.; Search for: Ketterson, J.B.
Format	Text, Article
Abstract	We report ultrasonic attenuation measurements on sinter-forged YBa2Cu3O7−δ 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.
Publication date	1989-01-01
In	Physical Review B 39, no. 1 (1 January 1989): 843–846.
Language	English
Peer reviewed	Yes
NRC publication	This is a non-NRC publication "Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC.
NPARC number	21273081
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Record identifier	ffcee45a-fc46-4844-a4cb-7bd556770844
Record created	2014-12-11
Record modified	2020-03-17

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