INTERBAND OPTICAL-ABSORPTION AND PLASMA EFFECTS IN HALF-METALLIC XMNY FERROMAGNETS

被引：49

作者：

KIRILLOVA, MM ^{[1
]}

MAKHNEV, AA ^{[1
]}

SHREDER, EI ^{[1
]}

DYAKINA, VP ^{[1
]}

GORINA, NB ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,INST MET,MOSCOW 117911,RUSSIA

来源：

PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1995年 / 187卷 / 01期

关键词：

D O I：

10.1002/pssb.2221870122

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The frequency dependence of the real and imaginary parts of the complex dielectric constant epsilon(omega) in compounds XMnY (X = Ni, Pd, Pt, Cu; Y = Sb, Sn) having C1(b) structure are investigated in the spectral range h omega = 0.05 to 8 eV. The values of conduction electron plasma and relaxation frequencies omega(p) and gamma, respectively, are determined. The evolution of interband conduction and electron energy-loss function -Im (epsilon(-1)) for varying compositions is studied. In all the compounds, apart from the main absorption band located in the spectral range 1 to 7 eV, a low-energy (h omega = 0.3 to 0.7 eV) interband absorption is revealed. An estimation is made of the energy gap at point Gamma of the Brillouin zone in the minority-spin subbands (down arrow) for NiMnSb using optical data.

引用

页码：231 / 240

页数：10

共 14 条

[1] MAGNETIC AND MAGNETOOPTICAL PROPERTIES OF NIMNSB1-XSNX COMPOUNDS IN RELATION TO THEIR ELECTRONIC BAND-STRUCTURE [J].