UNUSUAL SEEBECK AND NERNST EFFECTS IN THE MIXED STATE OF BI2-XPBXSR2CA2CU3O-DELTA

被引：52

作者：

GALFFY, M

FREIMUTH, A

MUREK, U

机构：

[1] Physikalisches Institut, Universität Köln

来源：

PHYSICAL REVIEW B | 1990年 / 41卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.41.11029

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Measurements of the Nernst and of the Seebeck coefficient in the mixed state on a polycrystalline sample of Bi1.76Pb0.24Sr2Ca2Cu3O are presented for temperatures between 70 and 120 K and magnetic fields up to 5 T. Nernst and Seebeck voltages are both large. The Seebeck voltage is larger by a factor of about 1000 than expected from the conventional flux creep-flow model. It is shown that our results can be understood if in addition to the flux flow-creep mechanism another important mechanism of dissipation is active. A possible mechanism based on fluctuations of the order parameter over internal weak links is discussed. © 1990 The American Physical Society.

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页码：11029 / 11032

页数：4

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