ULTRASONIC-ATTENUATION BY THE VORTEX LATTICE OF BI1.6PB0.4SR2CA2CU3OY

被引：25

作者：

LEMMENS, P ^{[1
]}

FRONING, P ^{[1
]}

EWERT, S ^{[1
]}

PANKERT, J ^{[1
]}

MARBACH, G ^{[1
]}

COMBERG, A ^{[1
]}

机构：

[1] PHILIPS GMBH,FORSCHUNGSLAB AACHEN,W-5100 AACHEN,GERMANY

来源：

PHYSICA C | 1991年 / 174卷 / 4-6期

关键词：

D O I：

10.1016/0921-4534(91)91559-M

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ultrasonic attenuation and velocity shift, induced by the vortex lattice of high-T(c) superconductors, are measured as a function of field, frequency and temperature. Two different ceramic samples, both of the Bi-2223 composition, are investigated: One is an isotropic and the other one a strongly textured sample. For the latter, eight different modes are analysed, differing from each other by the relative orientation of the wave vector, the displacement vector of sound and the applied magnetic field. The field induced attenuation shows a distinct peak and the sound velocity a step at the same temperature. These effects are explained by a transition of the flux line lattice from a pinned into a depinned state. The results can be described quantitatively by a simple model based on flux line diffusion.

引用

页码：289 / 302

页数：14

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