Gilbert damping constant in polycrystalline CO2MnSi Heusler alloy films

• Published in: Journal of magnetism and magnetic materials Vol. 310; no. 2; pp. 2322 - 2323
• Main Authors: YILGIN, R, OOGANE, M, ANDO, Y, MIYAZAKI, T
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Amsterdam Elsevier Science 01-03-2007
• Subjects: Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance; Magnetic properties and materials; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Materials science; Physics; Studies of specific magnetic materials; Treatment of materials and its effects on microstructure and properties; Damping; Annealing; Line widths; Ferromagnetic materials; Polycrystals; 76.50; 75.30G; 75.50; Thin films; Ferromagnetic resonance; Cathode sputtering; Ferromagnetic resonance; Gilbert damping; Heusler alloy; Magnetic properties; Angular variation; Resonance technique; Landau Lifshitz equation; Magnetic properties
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2006.11.032

The Gilbert damping constant was investigated in polycrystalline Co2MnSi Heusler alloy thin films by ferromagnetic resonance (FMR) technique. Samples were prepared using the magnetron sputtering technique on SiO2 substrate and annealed at various temperatures to control the structure. The intrinsic Gilbert damping constant was obtained from angular dependences of peak-to-peak line widths fitting from FMR spectra using Landau-Lifshitz-Gilbert equation. Intrinsic damping constants of the polycrystalline Co2MnSi films were almost independent of the annealing temperature.