Studies of remnant magnetoresistance in granular AuCo films

N. Peleg, G. Gorodetsky

Research output: Contribution to journalArticlepeer-review

Abstract

The observation of remanence effects in the magnetoresistance of a granular Au0.82Co0.18 film is reported. The results obtained, at low temperatures and low magnetic fields, are analyzed on the basis of a simple model for remnant giant magnetoresistance. The comparison with similarly measured magnetization remanence, shows that mainly the small ferromagnetic Co particles, of volume V < 4.5 nm3, account for the giant magnetoresistance (GMR). The novel approach applied here for analyzing the dominant particles size in GMR, could be used for other granular magnetic materials as well.

Original languageEnglish
Pages (from-to)354-358
Number of pages5
JournalJournal of Magnetism and Magnetic Materials
Volume191
Issue number3
DOIs
StatePublished - 1 Jan 1999

Keywords

  • Fine particles
  • Giant magnetoresistance
  • Superparamagnetism
  • Thin films

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