LOW-TEMPERATURE TORSION PENDULUM MEASUREMENTS ON YBCO SUPERCONDUCTORS

被引：4

作者：

DEVOS, P ^{[1
]}

DEBATIST, R ^{[1
]}

CORNELIS, J ^{[1
]}

SERVAES, F ^{[1
]}

机构：

[1] VLAAMSE INSTELLING TECHNOL ONDERZOEK, DIV MAT, B-2400 MOL, BELGIUM

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1994年 / 211卷

关键词：

D O I：

10.1016/0925-8388(94)90501-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We report low temperature torsion pendulum measurements on two types of YBa2Cu3O7-delta superconducting samples made from different precursors. The internal friction and modulus of the samples show in some aspects different behaviour than reported in the literature so far: a broad maximum of the internal friction around room temperature and a strong reduction of the anomalies near T-c. In addition, in both samples a peak becomes apparent when the samples are cooled below a temperature around T-c. The maximum for this peak is at 145 and 200 K for the two samples (for a frequency of about 10 Hz). Possible mechanisms for the peaks are discussed; however, details of the exact mechanism for these anomalies remain rather unclear.

引用

页码：276 / 278

页数：3

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