Nanosecond magnetic relaxation processes in ultrathin metallic films prepared by MBE

R. Urban, B. Heinrich, G. Woltersdorf, K. Ajdari, K. Myrtle, J. F. Cochran, E. Rozenberg

Research output: Contribution to journalArticlepeer-review

44 Scopus citations

Abstract

Magnetic relaxation processes were investigated by ferromagnetic resonance (FMR) using crystalline Cr/ Fe/GaAs(001) ultrathin film structures grown by molecular beam epitaxy (MBE). For Fe films thicker than 1.5 nm the extrinsic relaxation term showed evidence of two magnon scattering. Above 10 GHz the in-plane FMR linewidth was linearly dependent on the microwave frequency with an appreciable zero-frequency offset. The zero frequency offset measures the strength of extrinsic damping. The in-plane Gilbert damping includes both the intrinsic and extrinsic Gilbert contributions in qualitative agreement with recent predictions by Arias and Mills.

Original languageEnglish
Pages (from-to)204021-204024
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number2
DOIs
StatePublished - 1 Jan 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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