Doped Pr0.7-xBixSr0.3MnO3 manganite: A structural, electrical and magnetic effect

被引：14
作者：
Kumar, Neeraj [1 ,2 ]
Kishan, H. [1 ]
Rao, A. [2 ]
Awana, V. P. S. [1 ]
机构：
[1] Natl Phys Lab, CSIR, Superconduct & Cryogen Div, New Delhi 110012, India
[2] Manipal Inst Technol, Dept Phys, Manipal 576104, Karnataka, India
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 504卷 / 02期
关键词：
Manganites; Metal-insulator transition; Charge order; CURIE-TEMPERATURE; CONDUCTION; CA; SR;
D O I：
10.1016/j.jallcom.2010.06.011
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Structural, electrical and magnetic properties of Pr0.7-xBixSr0.3MnO3 (x = 0.00, 0.15, 0.25) compound have been studied. A decrease in unit cell volume is observed, although Bi3+ (1.17 angstrom) ion has larger ionic radii than Pr3+ (1.126 angstrom) ion and can be understood in a scenario of coexistence of charge ordered and ferromagnetic phase. "Electrical-resistivity and Magnetic" measurements show that the transition temperature (T-MI, T-C) increases i.e. "284.6 K, 276.5 K" to "294.04 K, similar to 300 K" for Pr0.70Sr0.3MnO3 and Pr0.45Bi0.25Sr0.3MnO3 compounds, respectively. Larger ionic size of Bi3+ ion encourages double-exchange (DE) interaction, which in turns result an increase in transition temperatures. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：L39 / L41
页数：3
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