Current-induced effects in La5/8-yPryCa3/8MnO3 (y=0.35) single crystals

被引：10

作者：

Garbarino, G

Monteverde, M

Acha, C

Levy, P

Quintero, M

Koo, TY

Cheong, SW

机构：

[1] Univ Buenos Aires, FCEyN, Dept Fis, Lab Bajas Temp, Buenos Aires, DF, Argentina

[2] Comis Nacl Energia Atom, Dept Fis, RA-1650 Buenos Aires, DF, Argentina

[3] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08855 USA

来源：

PHYSICA B-CONDENSED MATTER | 2004年 / 354卷 / 1-4期

关键词：

non-linear effects; manganites; percolation; phase separation;

D O I：

10.1016/j.physb.2004.09.011

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

DC electrical current-dependent resistance and pulsed current-voltage characteristics as a function of temperature of mixed valent Mn oxide-based La5/8-yPryCa0.375MnO3 (y = 0.35) single crystals are reported. We find that the low-temperature regime of this material is strongly current dependent. For small current densities (similar to10 muA/cm(2)), the metal-insulator transition related to the low-temperature enlargement of the ferromagnetic fraction is not observed down to 10 K. Higher current densities causes a large decrease of the resistance, which is temperature dependent and exhibits memory effects. Our results are interpreted within a scenario of strong competition between charge and ferromagnetic ordering. (C) 2004 Published by Elsevier B.V.

引用

页码：16 / 19

页数：4

共 10 条

[1] Current switching of resistive states in magnetoresistive manganites [J].