Magnetic coupling in Fe/Fe-SiO2/Ni80Fe20 thin films

J. Gómez, A. Butera, J. L. Weston

Research output: Contribution to journalArticle

Abstract

Using ferromagnetic resonance (FMR) at Q-band (ν=34 GHz) and DC magnetization measurements we have studied the magnetic behavior of a Fe/Fe-SiO2/Ni80Fe20 trilayer system as a function of the granular spacer thickness and the Fe volume concentration of the spacer. The hysteresis loops can have one or two step reversal process depending on the magnitude of the exchange field, HE, between the continuous FM layers. In a series of selected samples we have been able to estimate the values of HE from the FMR data. These values are always positive (indicating FM coupling) and are in reasonably good agreement with those reported in similar systems. We have found that the interaction increases with the Fe volume concentration and decreases with the thickness of the granular spacer.

Original languageEnglish (US)
Pages (from-to)126-128
Number of pages3
JournalPhysica B: Condensed Matter
Volume384
Issue number1-2
DOIs
StatePublished - Oct 1 2006

Keywords

  • Coupling system
  • Ferromagnetic resonance
  • Granular magnetic films

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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