Title :
Nucleation field and energy product of aligned two-phase magnets-progress towards the `1 MJ/m3´ magnet
Author :
Skomski, R. ; Coey, J.M.D.
Author_Institution :
Dept. of Pure & Appl. Phys., Trinity Coll., Dublin, UK
fDate :
11/1/1993 12:00:00 AM
Abstract :
The exchange hardening of nanostructured two-phase systems composed of an aligned hard phase and a soft phase with high magnetization is investigated using a micromagnetic approach, which accounts for interactions between the soft regions. For Sm2Fe 17N3(2.5 nm)/Fe65Co35(9 nm) multilayers, an energy product as high as 1 MJ/m3 (120 MGOe) is predicted, with a rare-earth content of only 5 wt.%. Giant energy products may also be achieved in suitable cellular and disordered structures
Keywords :
cobalt alloys; exchange interactions (electron); ferromagnetic properties of substances; iron alloys; magnetic multilayers; magnetisation; nanostructured materials; permanent magnets; samarium alloys; Sm2Fe17N3-Fe65Co 35; aligned hard phase; aligned two-phase magnets; cellular structure; disordered structures; energy product; exchange hardening; high magnetization; micromagnetic approach; multilayers; nanostructured two-phase systems; nucleation field; rare-earth content; soft phase; Anisotropic magnetoresistance; Coercive force; Iron; Magnetic anisotropy; Magnetic materials; Magnetostatics; Magnets; Micromagnetics; Perpendicular magnetic anisotropy; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
