Structure, magnetoresistance and magnetism of La0.67(Sr1-xBax)0.33MnO3 perovskite

被引：0

作者：

Zalita, Z. ^{[1
]}

Halim, S. A. ^{[1
]}

Lim, K. P. ^{[1
]}

Lee, O. J. ^{[1
]}

Walter, C. P. ^{[1
]}

Talib, Z. A. ^{[1
]}

Hishamuddin, Z. ^{[1
]}

机构：

[1] Univ Putra Malaysia, Fac Sci, Supercond & Thin Films Lab, Dept Phys, Serdang 43400, Selangor, Malaysia

来源：

CURRENT ISSUES OF PHYSICS IN MALAYSIA | 2008年 / 1017卷

关键词：

colossal magnetoresistance; low field magnetoresistance;

D O I：

暂无

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of Ba-substitution at Sr site on the structure, magnetoresistance and magnetic properties of La-0.67(Sr1-xBa)(0.33)MnO3 samples with x = 0.00, 0.25, 0.50, 0.75 and 1.00 has been investigated. Single phase samples were obtained by a conventional solid state reaction method with rhombohedral (x = 0.00) and orthorombic (x = 1.00) structure. The grain size increases with Ba content. Low field magnetoresistance phenomenon at low temperature can be observed for all samples. However it vanishes at 300 K for x = 0.75 and 1.00. The variation of MR% value is small ranging between 16 to 18% at 100 K in an applied field of 1 T. All samples show a single magnetic transition from the ferromagnetic (FM) state to the paramagnetic (PM) state as the temperature increases. Curie temperature, T-c decrease with increasing Ba concentration.

引用

页码：259 / 263

页数：5

共 9 条

[1] A systematic study of structural, magnetic and electrical properties of (La1-xTbx)(2/3)Ca1/3MnO3 perovskites [J].