Title

Enhanced Hyperfine Magnetic Fields For Face-Centered Tetragonal Fe(110) Ultrathin Films On Vicinal Pd(110)

Abstract

The structure and hyperfine magnetic properties 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 57Fe conversion electron Mössbauer 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 57Fe CEMS measurements which indicate an enhanced saturation hyperfine field of ∼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. © 2005 The American Physical Society.

Publication Date

2-1-2005

Publication Title

Physical Review B - Condensed Matter and Materials Physics

Volume

71

Issue

6

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1103/PhysRevB.71.064409

Socpus ID

16244407758 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/16244407758

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