Interface atomic structures and magnetic anisotropy of Fe and Pd/Fe monatomic films on Pd(001)

Tetsuro Ueno, Masahiro Sawada, Kazuhito Furumoto, Tetsuro Tagashira, Satoshi Tohoda, Akio Kimura, Shinya Haraguchi, Masahito Tsujikawa, Tatsuki Oda, Hirofumi Namatame, Masaki Taniguchi

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The magnetic anisotropy of monatomic Fe films on Pd(001) with or without a Pd overlayer was investigated from the standpoint of interface atomic structures. Quantitative analysis included low-energy electron diffraction and x-ray magnetic circular dichroism (XMCD) experiments, and first-principles calculations were also performed on monatomic Fe and Pd/Fe systems. It was revealed that Fe atoms intermix with the Pd substrate at room temperature. A spin reorientation transition occurs at a critical Fe thickness of 1.2 monolayers (ML) in Fe/Pd(001), while in-plane magnetic anisotropy is persistent in Pd/Fe/Pd(001) throughout the entire sample. The Fe 3d spin and orbital magnetic moments for both systems are strongly enhanced near 1 ML Fe thickness, as compared to those of the bulk iron crystal. In addition, an induced magnetic moment in interfacial Pd atoms was observed by XMCD at the Pd M 2,3 core absorption edges. It was concluded that the L1 0-like tetragonally distorted interface atomic structure in monatomic Fe/Pd(001) induces the perpendicular magnetic anisotropy.

Original languageEnglish
Article number224406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number22
DOIs
Publication statusPublished - 2012 Jun 11

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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