Optical conductivity and magnetic parameters of the intermetallic compounds R2Fe17-xMx (R=Y, Ce, Lu; M=Al, Si)

被引：12

作者：

Knyazev, YV ^{[1
]}

Kuchin, AG ^{[1
]}

Kuz'min, YI ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 327卷 / 1-2期

基金：

俄罗斯基础研究基金会;

关键词：

rare earth compounds; transition metal compounds; magnetically ordered materials; electronic structure; optical properties;

D O I：

10.1016/S0925-8388(01)01429-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Optical properties of the intermetallic compounds R2Fe17-xMx (R=Y, Ce, Lu, M=Al, Si, x=0, 1.7) were investigated in the energy range 0.083-5.64 eV. It was shown that the Curie temperature enhancement for substitutional alloys is accompanied by a decrease in the plasma frequency of the conduction electrons, which indicates a decrease in the density of states at the Fermi level N(E-F). This correlation was explained using the spin-fluctuation model of Mohn and Wohlfarth. From the analysis of recent results on the electronic, structural and magnetic properties of the R2Fe17-xMx compounds, a supposition is made about the connection of N(E-t ) with the distance between Fe ions in the 'dumbbell' crystal site. (C) 2001 Elsevier Science BV All rights reserved.

引用

页码：34 / 38

页数：5