Electrical and magnetic properties of transition metal oxides Ln1-xAxMO3 (Ln = Pr, Nd; A = Ca, Sr; M = Mn, Co)

被引：0

作者：

Deac, I. G. ^{[1
]}

Vladescu, A. ^{[1
]}

Balasz, I. ^{[1
]}

Tunyagi, A. ^{[1
]}

Tetean, R. ^{[1
]}

机构：

[1] Univ Babes Bolyai, Fac Phys, Cluj Napoca 400084, Romania

来源：

JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS | 2010年 / 12卷 / 08期

关键词：

Cobaltites; Manganites; Colossal magnetoresistance; Phase separation; Size variance; GIANT MAGNETORESISTANCE; INTERNAL-PRESSURE; CATION DISORDER; PHASE-DIAGRAM; CHARGE; ORDER; BA;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The low temperature electrical and magnetic properties of the polycrystalline perovskite systems Ln(1-x)A(x)MO(3) with Ln = Pr, Nd; A = Ca, Sr and M = Mn, Co were studied as a function of the average size of the A-site cations < r(A)> and of the cation size variance sigma(2). The cobaltites Pr(0.7)A(0.3)CoO(3) keep some reminiscences of the electrical and magnetic properties of the manganites Pr(0.7)A(0.3)MnO(3), but they behave differently as a function of the doping ions. Sr substitution for Ca in Nd0.5Ca0.5MnO3 induces FM regions in an AFM background and the phase separation state can be controlled by doping.

引用

页码：1818 / 1824

页数：7

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