Oxygen-redistribution-induced disorder and magnetotransport properties of Sm0.55Sr0.45MnO3 manganites

被引：20

作者：

Egilmez, M. ^{[1
]}

Chow, K. H. ^{[1
]}

Jung, J. ^{[1
]}

机构：

[1] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1063/1.2335574

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The authors studied the effects of oxygen-redistribution-induced disorder on the magnetotransport of Sm0.55Sr0.45MnO3 manganites near the metal-insulator transition. Oxygen redistribution in the sample was obtained by annealing at 325 degrees C in vacuum. The temperature dependences of resistivity and magnetoresistance were measured as a function of the annealing time. The authors observed a dramatic increase in the magnitude of the resistivity peak at the metal-insulator transition and a reduction of its width after an initial short-time annealing, followed by a logarithmic increase of the resistivity with annealing time. The data agree qualitatively with phase-separation theories for colossal magnetoresistance manganites. (c) 2006 American Institute of Physics.

引用

页数：3

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