Effect of DPPH radical adsorption on the superconducting properties of HTSC bismuth ceramics

被引：2
|
作者：
Makarshin, LL [1 ]
Parmon, VN [1 ]
机构：
[1] Fed Sci Ctr, Boreskov Inst Catalysis, Novosibirsk 630090, Russia
来源：
CHEMICAL PHYSICS LETTERS | 2000年 / 327卷 / 3-4期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1016/S0009-2614(00)00785-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Measuring the AC susceptibility and registering the ESR spectra of the stable 1,1-diphenyl-2-picryl-hydrazyl (DPPH) radical at 77.3-125 K, we have studied the effect of the radical on the current properties of the intergranular contacts in the superconducting ceramics Bi1.8Pb0.3Sr1.9Ca2.8Cu3.4Oy. Critical current in the ceramics is decreased by the magnetic field generated by the radical spin. The effect of the field on the critical current corresponds to the location of the adsorbed radical at a distance of 56 Angstrom from the superconducting phase. (C) 2000 Published by Elsevier Science B.V.
引用
收藏
页码：176 / 180
页数：5
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