Magnetic, optical, and electrical properties of solid solutions VxFe1-xBO3

被引：29

作者：

Ivanova, NB ^{[1
]}

Rudenko, VV ^{[1
]}

Balaev, AD ^{[1
]}

Kazak, NV ^{[1
]}

Markov, VV ^{[1
]}

Ovchinnikov, SG ^{[1
]}

Edel'man, IS ^{[1
]}

Fedorov, AS ^{[1
]}

Avramov, PV ^{[1
]}

机构：

[1] Russian Acad Sci, Siberian Div, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2002年 / 94卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

Electric conductivity - Electric insulators - Electron energy levels - Electronic structure - Iron compounds - Light absorption - Magnetization - Semiconductor materials;

D O I：

10.1134/1.1458479

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Complex studies of magnetic, electrical, and optical properties of VxFe1 - xBO3 solid solutions are carried out in the entire range of concentrations between the extreme compounds VBO3 and FeBO3 . A concentration semiconductor-insulator transition accompanied by a change in the magnetic structure is observed. It is found that the physical properties of the solid solution under investigation differ from those predicted in the model of a virtual crystal in the form of an aggregate of V and Fe centers taken with the weight of x and 1- x, respectively. The systems of electron energy levels of the VB6O6 and FeB6O6 clusters are calculated from first principles using the Hartree-Fock method. The calculated electron structure forms the basis for simulating the optical absorption spectra, which are in good agreement with experimental results. A qualitative explanation is given for the entire body of data on electrical conductivity and magnetization. (C) 2002 MAIK "Nauka / Interperiodica".

引用

页码：299 / 306

页数：8

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