Exchange coupling energy determined by ferromagnetic resonance in 80Ni-Fe/Cu multilayer films

Y. Ando, H. Koizumi, T. Miyazaki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Ferromagnetic resonance (FMR) experiments were carried out for [80Ni-Fe(60 Å)/Cu(dCu Å)]N, (dCu = 10-12, N = 2-5) multilayer films fabricated by a sputtering method. The main resonance peak had a broad shoulder located on the higher magnetic field side. Namely, the exchange energy between the magnetic layers was antiferromagnetic. In order to estimate the exchange energy, the FMR absorption spectrum was calculated using the Landau-Lifshitz equation of motion. The calculation model was improved so that we were able to analyze the spectrum for a multilayer with N magnetic layers. The exchange energy obtained from FMR analysis was compared with that estimated from the saturation magnetic field in the magnetoresistance (MR) curve. The positions and the intensity ratio of the resonance peaks were dependent on merely the exchange energy but not on the number of layers. The MR ratio was roughly proportional to the exchange energy.

Original languageEnglish
Pages (from-to)75-81
Number of pages7
JournalJournal of Magnetism and Magnetic Materials
Volume166
Issue number1-2
DOIs
Publication statusPublished - 1997 Feb

Keywords

  • Exchange coupling energy
  • Ferromagnetic resonance
  • Giant magnetoresistance
  • Multilayer - Metallic

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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