Structural study of pressure-induced magnetic phase transitions in manganites Pr0.7Ca0.3Mn1-yFeyO3 (y=0, 0.1)

被引：3
|
作者：
Kozlenko, DP [1 ]
Glazkov, VP
Medvedeva, IV
Savenko, BN
Voronin, VI
机构：
[1] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Moscow Reg, Russia
[2] Russian Res Ctr, Kurchatov Inst, Moscow 123182, Russia
[3] RAS, Inst Met Phys, Ural Branch, Ekaterinburg 620219, Russia
来源：
HIGH PRESSURE RESEARCH | 2003年 / 23卷 / 1-2期
关键词：
pressure; crystal and magnetic structure; manganites;
D O I：
10.1080/0895795031000114476
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A crystal and magnetic structure of manganites Pr0.7Ca0.3Mn1-yFeyO3 (y = 0, 0.1) has been studied by means of powder neutron diffraction at pressures up to 4 GPa in the temperature range 15-300 K. Under high pressure, an appearance of A-type antiferromagnetic state in both systems was observed. Both compounds exhibit anisotropic compression of the lattice which leads to the apical compression of MnO6 octahedra along the crystallographic b-axis. The calculated from obtained structural data pressure dependence of the charge-carrier bandwidth is in a qualitative agreement with observed pressure behavior of insulator-metal transition temperature within the framework of the double-exchange model.
引用
收藏
页码：149 / 153
页数：5
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