NUCLEATION FIELD AND ENERGY PRODUCT OF ALIGNED TWO-PHASE MAGNETS - PROGRESS TOWARDS THE '1 MJ/m3' MAGNET

Authors

Ralph Skomski, University of Nebraska-LincolnFollow
J.M.D. Coey, Trinity College, Dublin, Ireland

Date of this Version

November 1993

Comments

Published in IEEE TRANSACTIONS ON MAGNETICS, VOL. 29, NO. 6, NOVEMBER 1993.

Abstract

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 Sm₂Fe₁₇N₃ (2.5 nm)/Fe₆₅Co₃₅ (9 nm) multilayers an energy product as high as 1 MJ/m³ (120 MCOe) is predicted, witb a rare-earth content of only 5 wt %. Giant energy products may also be achieved in suitable cellular and disordered structures.