Anomalous Magnetotransport Properties of Bi Doped La0.67Sr0.33MnO3

被引：5

作者：

Kambhala, Nagaiah ^{[1
]}

Samatham, S. Shanmukharao ^{[2
]}

Venkatesh, R. ^{[2
]}

Ganesan, V. ^{[2
]}

Angappane, S. ^{[1
]}

机构：

[1] Ctr Nano & Soft Matter Sci, Bangalore 560013, Karnataka, India

[2] UGC DAE Consortium Sci Res, Low Temp Lab, Univ Campus,Khandwa Rd, Indore 452001, Madhya Pradesh, India

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2018年 / 255卷 / 03期

关键词：

charge ordering; magnetoresistance; manganite; phase separation; PHASE-SEPARATION; COLOSSAL MAGNETORESISTANCE; MANGANESE OXIDES; MAGNETIC-FIELD; PARTICLE-SIZE; MANGANITES; RESISTIVITY;

D O I：

10.1002/pssb.201700194

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have studied the magnetotransport properties of La0.67-xBixSr0.33MnO3 (x=0, 0.3, 0.4, 0.5). The x0.3 samples show metal-insulator transitions, whereas x0.4 samples exhibit an insulating behaviour at zero field. Notably, two low-temperature upturns were observed for La0.37Bi0.3Sr0.33MnO3, which indicates the existence of two different mechanisms. La0.27Bi0.4Sr0.33MnO3 shows field-induced metallic behavior due to the melting of charge ordering with applied magnetic field. A large magnetoresistance of approximate to 100% is observed for La0.27Bi0.4Sr0.33MnO3 at approximate to 90K. On the other hand, La0.37Bi0.3Sr0.33MnO3 exhibits a nearly constant large magnetoresistance of approximate to 80% between approximate to 30 and 250K, which decreases outside this temperature range. The observed anomalous low-temperature magnetotransport properties of La0.67-xBixSr0.33MnO3 are shown to arise from the coexisting phases of ferromagnetic metallic and antiferromagnetic charge-ordered insulating states.

引用

页数：5

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