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T(3/2) dependence of the interlayer exchange coupling in ferromagnetic multilayers.

J Lindner1, C Rüdt, E Kosubek

  • 1Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany. babgroup@physik.fu-berlin.de

Physical Review Letters
|April 17, 2002
PubMed
Summary

Interlayer exchange coupling in ferromagnetic films follows a T(3/2) law across nonmagnetic spacers. This finding holds true over a broad temperature range, confirmed by in situ ferromagnetic resonance experiments.

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Area of Science:

  • Condensed matter physics
  • Materials science
  • Magnetism

Background:

  • Understanding interlayer exchange coupling is crucial for spintronic devices.
  • Ferromagnetic films separated by nonmagnetic spacers exhibit unique magnetic properties.

Purpose of the Study:

  • To investigate the temperature dependence of interlayer exchange coupling.
  • To determine the validity of theoretical models for coupling behavior.

Main Methods:

  • In situ ferromagnetic resonance (FMR) experiments were conducted.
  • Various ferromagnetic film/nonmagnetic spacer systems were analyzed.

Main Results:

  • Clear experimental evidence for a T(3/2) law was observed.
  • This behavior was consistent across a wide temperature regime.

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Conclusions:

  • The T(3/2) law accurately describes interlayer exchange coupling temperature dependence.
  • Results provide insights into magnetic coupling mechanisms in multilayered structures.