Title :
Magnetomechanical properties and anisotropy compensation in quaternary rare earth-iron materials of the type TbxDyy HozFe2
Author :
Busbridge, S.C. ; Piercy, A.R.
Author_Institution :
Dept. of Math. Sci., Univ. of Brighton, UK
fDate :
11/1/1995 12:00:00 AM
Abstract :
The static and dynamic magnetomechanical properties, in the temperature range -60°C to +100°C, of quaternary compositions of the type TbxDyyHozFe2 (x+y+z=1) which have K1 close to zero at +20°C are presented. The maximum room temperature values of d33 (7.9 nm A-1) and k33(0.62) are achieved for Tb0.20 Dy0.22Ho0.58Fe2, the composition for which K2 is also close to zero at +20°C. Calculations performed with an anisotropy model including an eighth-order term show a 20 fold decrease in the anisotropy of Tb0.20Dy0.22Ho0.58Fe2 in comparison with Terfenol-D. This decrease is not as effective in improving material performance as the opposing influence of the reduction in saturation magnetostriction
Keywords :
dysprosium alloys; ferromagnetic materials; holmium alloys; iron alloys; magnetic anisotropy; magnetic susceptibility; magnetisation; magnetomechanical effects; terbium alloys; -60 to 100 C; Tb0.20Dy0.22Ho0.58Fe2; TbxDyyHozFe2; anisotropy compensation; eighth-order term; magnetomechanical properties; saturation magnetostriction; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic materials; Magnetic moments; Magnetic properties; Permeability; Perpendicular magnetic anisotropy; Saturation magnetization; Shape; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
