Comparative GMR study of Fe/Cu granular films deposited by co-evaporation and cluster beam techniques

K. Wakoh, T. Hihara, T. J. Konno, K. Sumiyama, K. Suzuki

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

We produced Fe/Cu thin films by co-evaporation and cluster-beam (CB) deposition, and compared their magnetoresistance (MR) and magnetic properties. Both co-evaporated and CB-deposited films exhibit giant magnetoresistance (GMR), which do not saturate even at high fields: conduction electrons suffer spin-disorder scattering. With increasing Fe concentration, MR of the co-evaporated films show a sharp maximum at around 23 at.% Fe owing to percolation of magnetic Fe atoms. MR of the CB-deposited films, on the other hand, does not show such a peak. The magnetization of co-evaporated films is smaller than that of CB-deposited films and they do not saturate easily. These observations suggests that the magnetic states of the former are spin glass, while the latter may contain small ferromagnetic clusters. These results demonstrate that the co-evaporated films are chemically and magnetically homogeneous, whereas the CB-deposited films are heterogeneous having granular natures.

Original languageEnglish
Pages (from-to)326-330
Number of pages5
JournalMaterials Science and Engineering A
Volume217-218
DOIs
Publication statusPublished - 1996 Oct 30

Keywords

  • Cluster beam
  • Co-evaporation
  • Fe/Cu granular films
  • Giant magnetoresistance

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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