Hall measurements on La2/3Ca1/3MnO3-δ and Nd2/3Sr1/3MnO3-δ -: a comparative study

被引：20
|
作者：
Poddar, A
Muruguraj, P
Fischer, R
Gmelin, E
Barner, K
Haupt, L
Mandal, P
Rao, GH
机构：
[1] Univ Gottingen, Inst Phys 4, D-37073 Gottingen, Germany
[2] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany
[3] SINP, Kolkata 700064, W Bengal, India
[4] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China
来源：
PHYSICA B-CONDENSED MATTER | 1998年 / 254卷 / 1-2期
关键词：
R(2/3)A(1/3)MnO(3); Hall effect; metal-insulator transition;
D O I：
10.1016/S0921-4526(98)00418-9
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The Hall resistivity of epitaxial La2/3Ca1/3MnO3-delta 1 and bulk Nd2/3Sr1/3MnO3-delta 2 separates into a normal and an anomalous part. The anomalous Hall resistivity correlates with magnetisation data while the normal part suggests the use of a two-band model for these perovskites. Single carrier concentrations and mobilities are p less than or equal to 0.75 x 10(21) cm(-3) (4.2 K, Nd-Sr) and p less than or equal to 6.4 x 10(22) cm(-3) (4.2 K, La-Ca) and then mobilities at 4.2 K, B = 0 are mu(p) greater than or equal to 1.03 cm(2)/(V s) (Nd-Sr) or greater than or equal to 0.44 cm(2)/(V s) (La-Ca). (C) 1998 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：21 / 27
页数：7
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