A study of the Cu2MnAl Heusler alloy using ultraviolet photoemission spectroscopy

被引：8

作者：

Brown, D ^{[1
]}

Crapper, MD ^{[1
]}

Bedwell, KH ^{[1
]}

Flannery, LB ^{[1
]}

Petty, M ^{[1
]}

Skull, PA ^{[1
]}

机构：

[1] LOUGHBOROUGH UNIV TECHNOL,DEPT PHYS,LOUGHBOROUGH LE11 3TU,LEICS,ENGLAND

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1996年 / 8卷 / 32期

关键词：

D O I：

10.1088/0953-8984/8/32/013

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Ultraviolet photoemission spectroscopy has been employed to provide information on the valence band of the Cu2MnAl Heusler alloy. The contribution of the d bands of Mn and Cu to the density of states has been investigated by means of 3p to 3d resonant enhancement. The valence band extends to 6 eV below the Fermi level, with a main peak at a binding energy of 3.2 eV and a shoulder extending to the Fermi edge. Resonant photoemission indicates that the Mn 3d character extends across the full width of the band. An experimental photoemission spectrum obtained at a photon energy of 40 eV has been compared with a calculated spectrum derived from a theoretical band structure. The main difference occurs in the region 1-2 eV below the Fermi level. The calculated spectrum exhibits a peak at a binding energy of 1.5 eV, comprising contributions from both the Cu and Mn 3d bands. There is no evidence of a similar feature in the experimental spectrum.

引用

页码：5941 / 5950

页数：10

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