Enhanced hyperfine magnetic fields for face-centered tetragonal Fe(110) ultrathin films on vicinal Pd(110)

被引：10

作者：

Roldan Cuenya, B ^{[1
]}

Keune, W

Li, DQ

Bader, SD

机构：

[1] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA

[2] Univ Duisburg Essen, Fachbereich Phys, D-47048 Duisburg, Germany

[3] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW B | 2005年 / 71卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.71.064409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure and hyperfine magnetic proper-ties of epitaxial Fe ultrathin films on a vicinal Pd(110) surface have been investigated by means of low-energy electron diffraction (LEED), reflection high-energy electron diffraction (RHEED) and Fe-57 conversion electron Mossbauer spectroscopy (CEMS). LEED and RHEED provide evidence for initial pseudomorphic film growth. The RHEED determination of the in-plane atomic distance versus Fe film thickness demonstrates the stabilization of the metastable fcc-like Fe structure on Pd(110). This interpretation is supported by in situ Fe-57 CEMS measurements which indicate an enhanced saturation hyperfine field of similar to 39 T for a 3-monolayers-thick Fe film at 25 K. This is the highest value ever measured for Fe on a metallic substrate. Our results suggest that ultrathin fcc-like (face-centered tetragonal) Fe films on Pd(110) are in a ferromagnetic high-moment state with an enhanced hyperfine field due to electronic 3d-4d hybridization at the Fe/Pd interface.

引用

页数：9

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