Improvement of low-field magnetoresistance and Curie temperature in the hole doping of double perovskites Sr2FeMoO6 polycrystals

被引：3
|
作者：
Lu, M. F. [1 ]
Wang, J. P. [1 ]
Liu, J. F. [1 ]
Hao, X. F. [1 ]
Zhou, D. F. [1 ]
Wu, Z. J. [1 ]
Meng, Jian [1 ]
机构：
[1] Chinese Acad Sci, Changchun Inst Appl Chem, Key Lab Rare Earth Chem & Phys, Changchun 130022, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 09期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2344846
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Polycrystalline Sr2FeMoO6 compounds with most vacancies at normal Fe sites were fabricated through Mo hole doping; its effect is similar to Fe3+ by our estimation. Sharp increase of magnetoconductance at low field was evidence of spin-polarized tunneling between the grains. The room temperature low-field magnetoresistivity at optimal doping x=0.03 is 8.5% in 3000 Oe and increases to 11.4% in 1 T associated with soft magnetic behaviors; furthermore it exhibits a ferromagnetic Curie temperature of 450 K, connected with hole doping effect. The improved magnetoresistivity behavior was related to Curie temperature. (c) 2006 American Institute of Physics.
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页数：3
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