Electrical Resistivity of Iodine-Intercalated Bi2Sr2CaCu2O8Subjected to a Magnetic Field
作者:
A.M. Ghorayeb,
O. Monnereau,
L. Fermond,
T. Badeche,
N.E. Hussey,
C.D. Dewhurst,
I.R. Fisher,
W.S. Seow,
R.A. Doyle,
期刊:
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals
(Taylor Available online 1998)
卷期:
Volume 311,
issue 1
页码: 435-442
ISSN:1058-725X
年代: 1998
DOI:10.1080/10587259808042422
出版商: Taylor & Francis Group
关键词: intercalation;superconductivity;electrical resistivity;magnetic field.
数据来源: Taylor
摘要:
In this work we report on the intercalation of single crystals of Bi2Sr2CaCu2O8with iodine to form the stage-1 intercalated complex IBi2Sr2CaCu2O8, and on the electrical resistivity of this final product, both as a function of temperature,T, (between 10 K and 300 K) and magnetic field,H, (going up to 15 T). Both ρab, the resistivity in theab-plane, and ρc, the resistivity along thec-axis have been studied forH // abandH // c. We find that the metallic character of electrical conduction along the c-axis observed in the normal state in intercalated samples (as compared with the semiconducting character in the pristine host) is maintained when a magnetic field is applied, confirming that, in the normal state, a reduction in the anisotropy accompanies the intercalation process. In the superconducting state, however, we find that the magnetic field causes a broadening of the superconducting transition (as in non-intercalated Bi2Sr2CaCu2O8), especially whenH // c, indicating that the superconducting state retains a highly anisotropic character after intercalation. The resistivity data in the flux-flow regime have also allowed us to estimate values of the activation energy for vortex movement.
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