X-RAY-DIFFRACTION STUDY OF LATTICE STRAIN IN FE/AU(001) SUPERLATTICE FILMS

被引：22

作者：

NAKAYAMA, N ^{[1
]}

OKUYAMA, T ^{[1
]}

SHINJO, T ^{[1
]}

机构：

[1] KYOTO UNIV,INST CHEM RES,UJI,KYOTO 611,JAPAN

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1993年 / 5卷 / 09期

关键词：

D O I：

10.1088/0953-8984/5/9/002

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

X-ray diffraction analyses of Fe/Au(001) superlattice films have revealed a body-centred tetragonal (BCT) structure with c/a = 1.1 for Fe layers thinner than 1.0 nm when Au layer thicknesses are 3.0 nm. The perfect in-plane lattice matching was confirmed by off-axial measurements. The observed in-plane lattice parameter, a = 0.2875 mm for BCT Fe, is close to the lattice dimension of bulk BCC Fe. However, profile analyses of axial scans have indicated that the Fe(002) lattice spacing along the growth direction has expanded. Such a tetragonal distortion cannot be explained by the normal elastic theory. The observed BCT structure of Fe would be a transient state on the BOC-FCC deformation path stabilized by a size effect or an interface effect. The tetragonal distortion is almost relaxed when Fe layers are thicker than 2.0 nm.

引用

页码：1173 / 1186

页数：14

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