Magnetization of La- and Ce-doped CaMnO3 manganite single crystals in a strong magnetic field

被引：7
|
作者：
Loshkareva, N. N. [1 ]
Mushnikov, N. V. [1 ]
Korolev, A. V. [1 ]
Balbashov, A. M. [2 ]
机构：
[1] Russian Acad Sci, Inst Met Phys, Ural Div, Ekaterinburg 620041, Russia
[2] Moscow Power Engn Inst, Moscow 111250, Russia
来源：
PHYSICS OF THE SOLID STATE | 2009年 / 51卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
75.47.Lx; 75.60.Ej;
D O I：
10.1134/S1063783409040222
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Studies of the magnetization curves of electron-doped single-crystal manganites Ca1 - x Ln (x) MnO3 (Ln = La3+, Ce4+; x a parts per thousand currency sign 0.12) in strong pulsed magnetic fields of up to 350 kOe have revealed a metamagnetic transition in Ca0.9Ce0.1MnO3 in the temperature range 77-190 K. The critical transition fields increase to similar to 350 kOe with the temperature decreasing to 100 K. The spin polarization is similar to 50% of the theoretical value. These results are interpreted as due to "melting" of the orbital/charge ordering below the temperature T (OO/CO) = 185 K = T (N) (of the C type AFM phase); this entails a decrease in the volume of the ordered phase with localized carriers and an increase in the volume of the ferromagnetic phase with delocalized carriers. The temperature and field dependences of the magnetization are used to compare two manganite systems in the region of the two-phase magnetic state.
引用
收藏
页码：773 / 777
页数：5
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