Investigation of the electrical and magnetic properties of electron-doped Ruddlesden-Popper phases, CaO(Pr0.08Ca0.92MnO3)n (n=1, 2, 3 and ∞)

被引：4

作者：

Sudheendra, L

Raju, AR

Lofland, SE

Ramanujachary, KV ^{[1
]}

机构：

[1] Rowan Univ, Dept Chem & Phys, Glassboro, NJ 08028 USA

[2] Jawaharlal Nehru Ctr Adv Sci Res, Chem & Phys Mat Unit, Bangalore 560064, Karnataka, India

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 126卷 / 08期

关键词：

magnetically ordered materials; electronic transport;

D O I：

10.1016/S0038-1098(03)00208-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The electrical and magnetic properties of Pr3+/--doped Ruddlesden-Popper manganates with the formula, CaO(Pr0.08Ca0.92 MnO3)(n) (n = 1,2,3 and infinity) have been investigated. The electrical conductivity of the samples increases with the number of perovksite slabs sandwiched between the rock-salt-like CaO layers. Magnetic susceptibility measurements show an anomalous behavior for the n = 1 composition which is attributed to the near absence of ferromagnetic correlations in a two-dimensional system. The magnetic behavior of other members can, however, be understood on the basis of a 'ferromagnetic-droplet' model. Since the number of electrons per perovskite slab is invariant across the series, the electronic properties are readily correlated to the phase space available for exchange interactions. (C) 2003 Elsevier Science Ltd. All rights reserved.

引用

页码：447 / 451

页数：5

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