Title :
Superparamagnetism of granular Fe-MgF2 films
Author :
Furubayashi, T. ; Nakatani, I.
Author_Institution :
Nat. Res. Inst. for Metals, Tsukuba, Japan
fDate :
7/1/1998 12:00:00 AM
Abstract :
Magnetic properties of Fe particles, with the size around 2 nm, in granular Fe-MgF2 films were investigated by DC and AC magnetization measurements. Anomalous two cusps appeared in zero-field cooled magnetization and AC susceptibility against temperature. Large nonlinear susceptibility suggests the freezing of moments induced by magnetic interaction between particles
Keywords :
ferromagnetic materials; iron; magnesium compounds; magnetic particles; magnetic susceptibility; magnetic thin films; superparamagnetism; AC susceptibility; Fe particles; Fe-MgF2; granular Fe-MgF2 films; large nonlinear susceptibility; magnetic interaction; magnetization measurements; superparamagnetism; zero-field cooled magnetization; Energy barrier; Glass; Iron; Magnetic anisotropy; Magnetic field measurement; Magnetic films; Magnetic susceptibility; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
