Surface acoustic wave measurements of YBa2Cu3O7-delta thin films and single crystals

被引：1

作者：

Gaffney, R ^{[1
]}

Hucho, C ^{[1
]}

Feller, JR ^{[1
]}

McKenna, WJ ^{[1
]}

Sarma, BK ^{[1
]}

Levy, M ^{[1
]}

机构：

[1] UNIV WISCONSIN,DEPT PHYS,MILWAUKEE,WI 53201

来源：

APPLIED PHYSICS LETTERS | 1997年 / 70卷 / 11期

关键词：

D O I：

10.1063/1.118564

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Surface acoustic wave (SAW) velocity and attenuation measurements have been performed on high-temperature superconducting YBa2Cu3O7-delta (YBCO) thin films (deposited on nonpiezoelectric substrates), and YBCO single crystals, A ''bridge'' technique is employed in which piezoelectric substrates, patterned with interdigital transducers, are bonded to the sample under investigation. The temperature dependence of 168 MHz SAW attenuation in a single crystal near its superconducting transition has been measured in applied magnetic fields up to 1.6 T. Features are seen above the superconducting transition temperature which may be indicative of a transition in the electric polarization of the material. A. field-dependent attenuation peak, seen in the superconducting state, is discussed in terms of the theory of thermally activated vortex motion. (C) 1997 American Institute of Physics.

引用

页码：1468 / 1470

页数：3

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