Colossal magnetoresistance in La2-2xSr1+2xMn2O7 single crystals

被引：28
|
作者：
Prellier, W
Suryanarayanan, R
Dhalenne, G
Berthon, J
Renard, JP
Dupas, C
Revcolevschi, A
机构：
[1] Univ Paris Sud, CNRS, UA 446, Chim Solides Lab, F-91405 Orsay, France
[2] Univ Paris Sud, IEF, F-91405 Orsay, France
来源：
PHYSICA B-CONDENSED MATTER | 1999年 / 259-61卷
关键词：
magnetoresistance; double perovskite; manganite; single crystals;
D O I：
10.1016/S0921-4526(98)00813-8
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We performed magnetisation (M) and transport measurements along the ab plane and the c direction in La2-2xSr1+2xMn2O7 single crystals for x = 0.4. In addition to a sharp para-ferromagnetic transition at T-c = 125 K, a weak maximum in M was found around 265 K. A sharp drop of resistivity at T-c associated with a semi-conductor to metal transition was found for both current orientations. The colossal magnetoresistance of the compound CMR = - (rho(H) - rho(0))/rho(0) was found to be similar to 100% in a held of 8 T near T-c. In contrast with the well-known La1-xSrxMnO3 type manganites, a CMR effect larger than 10% was present at all temperatures ranging between 5 and 300 K. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：833 / 834
页数：2
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