Effects of hydrogenation on structure and magnetic properties of Fe/La multilayers

Y. Endo, K. Matsuura, M. Yamamoto, Y. Kamada, A. Itoh, T. Suenobu, S. Fukuzumi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

We have studied the effects of hydrogenation on structure and magnetic properties of Fe (3.0 nm)/La (tnm) multilayers at the range of La layer thickness (t) from 0.3 to 4.2 nm. The effects of hydrogenation are the following. (a) All multilayers become a well-defined layered structure. (b) The bilayer thickness (Λ) becomes larger by a lattice expansion of only La layer. (c) The saturation magnetization (Ms)Fe of the multilayers becomes larger. The increment of (Ms)Fe is caused by the disproportionation of the Fe-La mixing layer to the pure Fe layer at the Fe/La interface. (d) The remanence ratio (Mr/Ms) and the saturation field (Hs) reflecting coupling state between the adjacent Fe layers change with increasing La layer thickness: the coupling state changes from a ferromagnetic (FM) state to a non-coupled (NC) state. This changing manner is the same, but the thickness range of spacer layer for FM coupling expands from 1.5 to 1.8 nm. This expansion of the thickness range is due to the change of interface structure and electronic structure caused by La-hydride formation.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalScience and Technology of Advanced Materials
Volume5
Issue number1-2
DOIs
Publication statusPublished - 2004 Jan
Externally publishedYes

Keywords

  • Fe-La mixing layer
  • Fe/La multilayer
  • Ferromagnetic coupling
  • Hydrogenation
  • Interlayer exchange coupling
  • La-hydride layer

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint

Dive into the research topics of 'Effects of hydrogenation on structure and magnetic properties of Fe/La multilayers'. Together they form a unique fingerprint.

Cite this