Coexistence of ferromagnetism and charge ordering in Pr0.5Ca0.5Mn1-xCrxO3

被引：83

作者：

Mahendiran, R ^{[1
]}

Hervieu, M ^{[1
]}

Maignan, A ^{[1
]}

Martin, C ^{[1
]}

Raveau, B ^{[1
]}

机构：

[1] Univ Caen, Lab CRISMAT, ISMRA, F-14050 Caen, France

来源：

SOLID STATE COMMUNICATIONS | 2000年 / 114卷 / 08期

关键词：

magnetically ordered materials; galvanomagnetic effects; electronic transport; scanning and transmission electron microscopy; exchange and superexchange;

D O I：

10.1016/S0038-1098(00)00076-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Magnetotransport and magnetization measurements of the Cr-doped manganites Pr0.5Ca0.5Mn1-xCrxO3 (x = 0.03, 0.05) show several anomalous features: large magnetic field induced magnetic moments and negative magnetoresistance (MR) with hysteresis, strong deviation of susceptibility from Curie-Weiss law below 240 K in the paramagnetic insulating phase, large differences between zero field cooled and field cooled magnetization and hysteresis in MR and magnetization in the ferromagnetic metallic phase. On the basis of magnetic measurements we suggest that Cr3+ replaces Mn3+ with opposite spin. In agreement with our magnetic and transport measurements, we show that charge ordering coexists with ferromagnetism using electron microscopy. Electron microscopy work together with susceptibility data suggests that charge and orbital ordering occur at different temperatures. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：429 / 433

页数：5

共 25 条

[1] Reentrant transition from an incipient charge-ordered state to a ferromagnetic metallic state in a rare-earth manganate [J].