Detection of Vortex Excitations in a Bi2Sr2Ca2Cu3O10 Crystal at Temperatures above the Critical Temperature by EPR of the Surface Layer

被引：0

作者：

Talanov, Yu. I. ^{[1
]}

Salakhutdinov, L. F. ^{[1
]}

Giannini, E. ^{[2
]}

Khasanov, R. I. ^{[3
]}

机构：

[1] Russian Acad Sci, Zavoisky Physicotech Inst, Kazan Sci Ctr, Kazan 420029, Russia

[2] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva, Switzerland

[3] Paul Scherrer Inst, Lab Muon Spin Spect, CH-5232 Villigen, Switzerland

来源：

JETP LETTERS | 2009年 / 90卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

T-C; FLUX; SUPERCONDUCTORS; MAGNETIZATION; LA2-XSRXCUO4;

D O I：

10.1134/S0021364009150090

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Vortex excitations have been detected at temperatures both below and above the critical temperature when investigating local magnetic fields on the surface of a Bi2Sr2Ca2Cu3O10 single crystal by means of an electron paramagnetic resonance (EPR) probe. A thin layer of a diphenyl picrylhydrazyl organic radical deposited on the crystal surface is used as the EPR probe. A narrow EPR signal makes it possible to detect weak distortions of the magnetic field appearing at T greater than or similar to T-c. The analysis of the temperature dependences of the resonance field and the EPR linewidth is the basis of the assumption of the vortex nature of magnetic excitations in this temperature range.

引用

页码：202 / 206

页数：5

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