Magnetoresistance effect in A2(FeMo)Ox double perovskites (A = Sr, Ca; 5.90 ≤ x ≤ 6.05)

被引：5

作者：

Lobanovskii, LS

Troyanchuk, IO

Pushkarev, NV

Szymczak, G

机构：

[1] Belarussian Acad Sci, Inst Solid State & Semicond Phys, Minsk 220072, BELARUS

[2] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

来源：

PHYSICS OF THE SOLID STATE | 2001年 / 43卷 / 04期

关键词：

D O I：

10.1134/1.1365992

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The dependences of magnetic, electric, and magnetotransport properties on oxygen non stoichiometry were investigated in compounds of Ca-2(FeMo)O-x and Sr-2(FeMo)O-x (5.90 less than or equal to x less than or equal to 6.05). The regular trends in behavior of the magnetization, resistance, and magnetoresistance of samples of these series are determined. It is established that the magnetoresistance is composed of two parts that appear as a result of magnetic ordering in grain-boundary layers and of the intergrain transport of spin-polarized charge carriers. The electronic transport in the samples is assumed to be governed by percolation processes between grains which have a metallic type of conductivity and are separated by insulating spacers. (C) 2001 MAIK "Nauka/Interperiodica".

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页码：677 / 681

页数：5

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