1000% colossal magnetoresistance at room temperature in the A-site ordered perovskite manganites, Sm1-xLax+yBa1-yMn2O6 -: art. no. 046108

被引：40
|
作者：
Nakajima, T [1 ]
Ueda, Y [1 ]
机构：
[1] Univ Tokyo, Inst Solid State Phys, Mat Design & Characterizat Lab, Kashiwa, Chiba 2778581, Japan
来源：
JOURNAL OF APPLIED PHYSICS | 2005年 / 98卷 / 04期
关键词：
D O I：
10.1063/1.2034078
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report colossal magnetoresistance at room temperature by introducing disorder to the A-site ordered manganites, SmBaMn2O6. SmBaMn2O6 shows the metal to CE-type charge/orbital ordered insulator transition at 375 K above room temperature. We have achieved a magnetoresistance effect of 340% at room temperature and 300%-600% around room temperature under 9 T in a sintered sample of Sm0.90La0.24Ba0.86Mn2O6. By using a single crystal the magnetoresistance (%) was elevated to 1000% at 9 T, a high value for bulk transition-metal oxides. (c) 2005 American Institute of Physics.
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