Local disorder effects on the pressure dependence of the metal-insulator transition in manganese perovskites

被引：56

作者：

Fontcuberta, J

Laukhin, V

Obradors, X

机构：

[1] CSIC, Inst Ciencia Mat Barcelona, E-08193 Bellaterra, Spain

[2] Inst Phys Chem, Chernogolovka, Russia

来源：

APPLIED PHYSICS LETTERS | 1998年 / 72卷 / 20期

关键词：

D O I：

10.1063/1.121432

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We address the role of the local disorder created by substitutional ions in L(2/3)A(1/3)MnO(3) oxides, on the pressure dependence of the Curie temperature dln T-C/dP. A number of manganites having distinct averaged lanthanide R-0 radii and size variance sigma(2) have been prepared and their resistivity measured up to 11 kbar. It is found that the measured dln T-C/dP is mainly determined by R-0. However, materials having larger local disorder display larger pressure sensitivity. It is proposed that this results from partial suppression of the local disorder under pressure, and a model is developed to account for the experimental data. (C) 1998 American Institute of Physics.

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页码：2607 / 2609

页数：3

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