Grain-boundary control and low-field magnetoresistance in La0.7Sr0.3MnO3 -: art. no. 10H707

被引：9

作者：

Patil, SI ^{[1
]}

Ogale, AS ^{[1
]}

Shinde, SR ^{[1
]}

Kundaliya, DC ^{[1
]}

Ogale, SB ^{[1
]}

Bhagat, SM ^{[1
]}

Venkatesan, T ^{[1
]}

机构：

[1] Univ Maryland, Dept Phys, Ctr Superconduct Res, College Pk, MD 20742 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2005年 / 97卷 / 10期

关键词：

D O I：

10.1063/1.1847847

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Sintered La0.7Sr0.3MnO3 ceramics were prepared by standard solid-state reaction route. Some of these pellets were again heated to 850 degrees C and quenched to room temperature. These samples were then studied for low-field magnetoresistance (LFMR) effects. Remarkably, upon quenching from high temperature the polycrystalline as well as the crystalline samples are seen to exhibit a dramatic change in LFMR with the emergence of a large positive MR. In the quenched samples a positive LFMR as high as 48% was noted in a field of 200 Oe. This positive MR effect was found to show time-dependent relaxation.

引用

页数：3

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