Fluorescence extended X-ray absorption fine structure analysis of half-metallic ferromagnet "zinc-blende CrAs" grown on GaAs by molecular beam epitaxy

被引：11

作者：

Ofuchi, H

Mizuguchi, M

Ono, K

Oshima, M

Akinaga, H

Manago, T

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Mat Sci & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

[2] Univ Tokyo, Bunkyo Ku, Tokyo 1138656, Japan

[3] Natl Inst Adv Ind Sci & Technol, Res Consortium Synth Nano Funct Mat Project, Tsukuba, Ibaraki 3058562, Japan

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2003年 / 199卷

关键词：

EXAFS; half-metallic ferromagnet; chromium compounds; arsenic compounds; X-ray fluorescence analysis;

D O I：

10.1016/S0168-583X(02)01539-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this work, geometric structures for a half-metallic ferromagnet "zinc-blende CrAs", which showed ferromagnetic behavior beyond room temperature, were investigated using fluorescence extended X-ray absorption fine structure (EXAFS) measurement. The EXAFS measurements revealed that As atoms around Cr atoms in the 2 nm CrAs film grown on a GaAs(O 0 1) substrate were coordinated tetrahedrally, indicating formation of zinc-blende CrAs. The Cr-As bond length in the zinc-blende CrAs is 2.49 Angstrom This value is close to that which was estimated from the lattice constant (5.82 Angstrom) of ferromagnetic zinc-blende CrAs calculated by full-potential linearized augmented-plane wave method. The EXAFS analysis show that the theoretically predicted zinc-blende CrAs can be fabricated on GaAs(O 0 1) substrate by low-temperature molecular-beam epitaxy. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：227 / 230

页数：4

共 10 条

[1] Material design of half-metallic zinc-blende CrAs and the synthesis by molecular-beam epitaxy [J].