ULTRASONIC INVESTIGATIONS ON SUPERCONDUCTING YBA2CU3O7-DELTA SAMPLES OF DIFFERENT MICROSTRUCTURE

被引：90
|
作者：
EWERT, S
GUO, S
LEMMENS, P
STELLMACH, F
WYNANTS, J
ARLT, G
BONNENBERG, D
KLIEM, H
COMBERG, A
PASSING, H
机构：
[1] RHEIN WESTFAL TH AACHEN,INST WERKSTOFFE ELEKTROTECH,D-5100 AACHEN,FED REP GER
[2] PHILIPS GMBH,FORSCH LAB AACHEN,D-5100 AACHEN,FED REP GER
来源：
SOLID STATE COMMUNICATIONS | 1987年 / 64卷 / 08期
关键词：
CERAMIC MATERIALS - Acoustic Properties - ULTRASONIC WAVES - Transmission;
D O I：
10.1016/0038-1098(87)90609-0
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Ultrasonic velocity and attenuation measurements down to 4. 2 K were performed on well characterized ceramic superconducting YBa//2Cu//3O//7// minus // delta samples of different microstructure. In fine grained samples of high volume density and excellent superconducting properties no softening in the sound velocity and no thermal hysteresis were found. A broad maximum at about 180 K and an anomaly near T//c were observed in the ultrasonic attenuation.
引用
收藏
页码：1153 / 1156
页数：4
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