Enhanced room-temperature magnetoresistance in partially melted La0.67Ca0.33MnO3 manganites

被引：34

作者：

Pradhan, AK ^{[1
]}

Roul, BK ^{[1
]}

Wen, JG ^{[1
]}

Ren, ZF ^{[1
]}

Muralidhar, M ^{[1
]}

Dutta, P ^{[1
]}

Sahu, DR ^{[1
]}

Mohanty, S ^{[1
]}

Patro, PK ^{[1
]}

机构：

[1] Inst Mat Sci, Bhubaneswar 751005, Orissa, India

来源：

APPLIED PHYSICS LETTERS | 2000年 / 76卷 / 06期

关键词：

D O I：

10.1063/1.125887

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have performed magnetic and transport measurements on La0.67Ca0.33MnO3 polycrystalline and partially melted samples. The magnetization and resistance decrease as sintering temperature is increased. The insulator-to-metal transition temperature is remarkably enhanced in the partially melted sample, enabling its possible applications at room temperature. The microscopic studies in melt samples show an excellent connectivity between grains, suggesting the enhancement of percolative transport by opening new conduction channels and the disappearance of magnetic phase boundary at elevated temperature by the ordering of Mn spins blocked at the grain boundary of sintered samples. (C) 2000 American Institute of Physics. [S0003- 6951(00)03905-X].

引用

页码：763 / 765

页数：3

共 19 条

[1] MAGNETORESISTANCE IN MAGNETIC MANGANESE OXIDE WITH INTRINSIC ANTIFERROMAGNETIC SPIN STRUCTURE [J].