ANOMALOUS BEHAVIOR OF THE FLUX LINE LATTICE OF VIBRATING HIGH-T(C) SUPERCONDUCTORS AT 30-K IN MAGNETIC-FIELDS PARALLEL TO THE CUO2 PLANES

被引：23

作者：

KOPELEVICH, Y

GUPTA, A

ESQUINAZI, P

机构：

[1] Physikalisches Institut, University of Bayreuth

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.70.666

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the energy dissipation and pinning of the flux line lattice (FLL) of vibrating high-T(c) superconducting crystals as a function of temperature, magnetic field, and angle theta between field and CuO2 planes. For Bi2Sr2CaCu2O8 and oxygen-deficient (Y0.94Gd0.06)Ba2Cu3O6.83 superconductors and for theta approximately 0-degrees we observed an anomalous depinning of the FLL at approximately 30 K. This anomaly cannot be explained by a thermally activated depinning mechanism and suggests the existence of a phase transition of the FLL.

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页码：666 / 669

页数：4

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