Transport and magnetic properties of Ru(Sr1-xLax)2RCu2O8 (R = Gd, Eu) superconductor

被引：5
作者：
Hassen, A
Mandal, P
Hemberger, J
Krimmel, A
Choudhury, P
Ghosh, B
Loidl, A
机构：
[1] Saha Inst Nucl Phys, ECMP Div, Kolkata 700064, W Bengal, India
[2] Univ Augsburg, EKM, D-86135 Augsburg, Germany
[3] Cent Glass & Ceram Res Inst, Kolkata 700032, W Bengal, India
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 398卷 / 3-4期
关键词：
ferromagnetic superconductor; upper critical field; phase diagram;
D O I：
10.1016/S0921-4534(03)01273-5
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The resistivity, thermopower and magnetic properties have been investigated systematically in the ferromagnetic superconductors Ru(Sr1-x,La-x)(2)RCu2O8 (R=Gd and Eu), in which carrier density has been reduced by partial replacement of Sr by La ions. With increasing x both the resistivity and thermopower are found to increase whereas superconducting transition temperature T, shows a considerable decrease and the system becomes more and more underdoped. Based on our results, we conclude that similar to other high-T-c materials, superconductivity appears in the vicinity of insulator to metal transition point at around 0.04 holes/Cu. (C) 2003 Elsevier B.V. All rights reserved.
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收藏
页码：123 / 130
页数：8
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