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.

引用

页码：123 / 130

页数：8