Ru-induced ferromagnetism and metallicity in Mn(IV)-rich manganites Ln0.4Ca0.6MnO3

被引：78

作者：

Raveau, B ^{[1
]}

Maignan, A ^{[1
]}

Martin, C ^{[1
]}

Mahendiran, R ^{[1
]}

Hervieu, M ^{[1
]}

机构：

[1] ISMRA, Lab CRISMAT, F-14050 Caen, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2000年 / 151卷 / 02期

关键词：

D O I：

10.1006/jssc.2000.8722

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The doping of Mn sublattice by Ru in the Mn(IV)-rich manganites Ln(0.4)Ca(0.6)MnO(3) (Ln: Lanthanide; Ln = La, Pr, Nd, Sm) induces an insulator-to-metal transition which is not obtained by Cr doping. The appearance of metallicity and ferromagnetism in these Ru-doped manganites is explained in the frame of the phase separation scenario, Ru forming ferromagnetic (FM) clusters, which extend as the Ru content increases. The particular aptitude of Ru for promoting a FM metallic state is discussed, on the basis of Ru(V) and Ru(IV) oxidation states, which are isoelectronic to Mn(IV) and Mn(III), respectively. Magnetoresistance is also evidenced and discussed. (C) 2000 Academic Press.

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页码：330 / 334

页数：5

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