Cr doping in the La1.2Sr1.8Mn2O7 system

被引：27

作者：

Gundakaram, R ^{[1
]}

Lin, JG

Lee, FY

Tai, MF

Shen, CH

Liu, RS

Huang, CY

机构：

[1] Natl Taiwan Univ, Ctr Condensed Matter Phys, Taipei 10617, Taiwan

[2] Natl Chung Cheng Univ, Dept Phys, Chiayi 621, Taiwan

[3] Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1999年 / 11卷 / 26期

关键词：

D O I：

10.1088/0953-8984/11/26/319

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The effect of doping Cr in the Mn site of the La(1.2)Srl(1.8)Mn(2)O(7) system has been studied. Addition of Cr modifies the transport and magnetic properties of the parent phase. With increasing Cr, the insulator-metal transition observed in the parent phase is suppressed and insulating behaviour is induced. In the range of doping studied (25%), the compositions show ferromagnetic behaviour with the Curie temperature decreasing with increasing Cr. The unit cell volume also shows a decrease. However, the magnetoresistance ratio is not significantly affected. We compare these results with an earlier study of doping Cr in the three-dimensional LaMnO3 structure, where it was seen that the ferromagnetic and magnetoresistance characteristics are sensitive to Cr doping. The results of the present study suggest that the layered manganates are more accommodative to doping compared to the three-dimensional perovskites.

引用

页码：5187 / 5194

页数：8

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