Details

Autor(en) / Beteiligte

• Serrano-Guisan, S
• Wu, Han-Chun
• Boothman, C
• Abid, M
• Chun, B S
• Shvets, I V
• Schumacher, H W

Titel

Thickness dependence of the effective damping in epitaxial Fe 3 O 4 / MgO thin films

Ist Teil von

• Journal of applied physics, 2011-01, Vol.109 (1), p.013907-013907-4

Ort / Verlag

American Institute of Physics

Erscheinungsjahr

2011

Link zum Volltext

Quelle

AIP Journals Complete

Beschreibungen/Notizen

• The precessional magnetization dynamics of high quality epitaxial magnetite ( Fe 3 O 4 ) thin films growth on MgO are investigated by inductive magnetization dynamic measurements in time and frequency domain. An upper bound for the intrinsic Gilbert damping parameter of α 0 = 0.037 ± 0.001 is derived, which is significantly lower than previously reported for epitaxial Fe 3 O 4 on GaAs. With increasing film thickness from 5 up to 100 nm a strong increase in the effective damping up to 0.2 is observed which cannot be explained by simple nonuniform spin wave excitations. Possible origins of this effect are discussed.