Charge-orbital ordering above room temperature in the 2D Pr1-xCa1+xMnO4 manganites

被引：29

作者：

Ibarra, M ^{[1
]}

Retoux, R ^{[1
]}

Hervieu, M ^{[1
]}

Autret, C ^{[1
]}

Maignan, A ^{[1
]}

Martin, C ^{[1
]}

Raveau, B ^{[1
]}

机构：

[1] Univ Caen, CNRS UMR 6508, ISMRA, Lab CRISMAT, F-14050 Caen, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2003年 / 170卷 / 02期

关键词：

Ruddlesden Popper phases; mangonites; electron microscopy; charge orbital ordering; magnetic properties;

D O I：

10.1016/S0022-4596(02)00124-X

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The investigation of the n = I member of the Ruddlesden Popper family, Pr1-xCa1+xMnO4, using electron microscopy, transport and magnetic measurements shows that these 2D manganites exhibit long-range charge-orbital ordering over a wide composition range (0.50 less than or equal to x less than or equal to 0.80). These oxides show a remarkably high T-CO temperature depending on the x value, up to 330K, the highest that has been observed to date in 2D manganites. They are characterized by the appearance of a smooth structural transition from P- to C-type inside the charge-ordered state. The high-resolution electron microscopy images of Pr0.5Ca1.5MnO4 registered at room temperature evidence a system of double stripes similar to those observed for Bi0.5Sr0.5MnO3, suggesting that double stripes of one sort of manganese alternate with double or quadruple stripes of a second sort of manganese. (C) 2002 Elsevier Science (USA). All rights reserved.

引用

页码：361 / 367

页数：7

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