Calorimetric evidence for enhancement of homogeneity in high performance Sr1-xKxFe2As2 superconductors

被引：10

作者：

Dong, Chiheng ^{[1
]}

Yao, Chao ^{[1
]}

Huang, He ^{[1
]}

Zhang, Xianping ^{[1
]}

Wang, Dongliang ^{[1
]}

Ma, Yanwei ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Key Lab Appl Superconduct, Inst Elect Engn, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

SCRIPTA MATERIALIA | 2017年 / 138卷

基金：

中国国家自然科学基金;

关键词：

High-temperature superconductors; Superconductivity; Homogenization; CRITICAL-CURRENT DENSITY; NB3SN WIRES; T-C; HEAT; TAPES; SR0.6K0.4FE2AS2;

D O I：

10.1016/j.scriptamat.2017.05.047

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We comparatively studied the critical current density, magnetization and specific heat of the rolled and the hot pressed Sr1-xKxFe2As2 tapes. The Schottky anomaly that is obvious in the specific heat of the rolled tape disappears in the hot-pressed tape. Moreover, the hot-pressed tape has a higher fraction of superconductivity and a narrower distribution of superconducting transition temperature than the rolled tape. Combined with the magnetization data, we conclude that sintering under high pressure provides a better environment for complete chemical reaction and more homogenous dopant distribution, which is beneficial to the global current of a superconductor. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：114 / 119

页数：6

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