Role of Co nanoparticles in CuTl-1223 superconductor

被引：3
|
作者：
Qasim, Irfan [1 ]
Waqee-ur-Rehman, M. [1 ]
Mumtaz, M. [1 ]
Nadeem, K. [1 ]
机构：
[1] IIU, Dept Phys FBAS, Mat Res Lab, Islamabad 44000, Pakistan
来源：
CERAMICS INTERNATIONAL | 2016年 / 42卷 / 01期
关键词：
(Co)(x)/CuTl-1223 nanoparticles-superconductor composites; Scattering cross-section; Superconducting volume fraction; Pair-breaking; SUSCEPTIBILITY MEASUREMENTS; MECHANICAL-PROPERTIES; SIO2; NANOPARTICLES; TEMPERATURE; (CU0.5TL0.5)-1223; MICROSTRUCTURE; ENHANCEMENT; PARTICLES; FILMS; AG;
D O I：
10.1016/j.ceramint.2015.09.040
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Cobalt (Co) nanoparticles were added in Cu0.5Tl0.5Ba2Ca2Cu3O10-delta(CuTl-1223) superconducting matrix to obtain (Co)(x)/CuTl-1223 (x=0, 0.25, 0.50, 0.75, and 1.0 wt%) nanoparticles-superconductor composites. The crystal structure of host CuTl-1223 phase was not affected but superconducting transport properties were suppressed after the addition of these nanoparticles. Suppression of superconductivity was attributed to ferromagnetic nature of Co nanoparticles due to enhanced scattering cross-section of the carriers. The average crystallite size of Co nanoparticles was 50 nm, which were usually found in blocked state along their anisotropy axis below room temperature. The sharp suppression of diamagnetic signal could be due to two possible reasons (i) decrease in superconducting volume fraction and (ii) pair-breaking across ferromagnetic Co nanoparticles in blocked state. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：1122 / 1127
页数：6
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