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

页码：149 / 153

页数：5

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