Title :
Analysis of magnetic aftereffects in nanocrystalline SmFeCo by the Preisach hysteresis model
Author :
LoBue, M. ; Cornejo, D.R. ; Basso, V. ; Missell, F.P. ; Bertotti, G.
Author_Institution :
IEN Galileo Ferraris & GNSM-CNR, Torino, Italy
fDate :
7/1/1999 12:00:00 AM
Abstract :
Magnetic viscosity measurements performed on nanocrystalline SmFeCo spring magnets with different Fe content are analyzed by the Preisach hysteresis model. The model gives a unified description of hysteresis and relaxation properties. Comparison between calculated and measured viscosity permits one to estimate the aftereffect activation volume υ. Calculated υ1/3 values are approximately equal to the average grain size of the hard phase
Keywords :
cobalt alloys; ferromagnetic materials; grain size; iron alloys; magnetic aftereffect; magnetic hysteresis; magnetic particles; magnetic relaxation; nanostructured materials; permanent magnets; samarium alloys; Fe content; Preisach hysteresis model; SmFeCo; aftereffect activation volume; average grain size; hard phase; hysteresis; magnetic aftereffects; magnetic viscosity; nanocrystalline SmFeCo; nanocrystalline SmFeCo spring magnets; relaxation properties; Grain size; Iron; Magnetic analysis; Magnetic hysteresis; Magnets; Performance analysis; Performance evaluation; Springs; Viscosity; Volume measurement;
Journal_Title :
Magnetics, IEEE Transactions on
