Title :
Grain structure and magnetism of nanocrystalline ferromagnets
Author_Institution :
Vacuumschmelze GmbH, Hanau, West Germany
fDate :
9/1/1989 12:00:00 AM
Abstract :
Amorphous ribbons of composition Fe73.5Cu1Nb 3Si13.5B9 have been annealed above their crystallization temperature, which produces a homogeneous, ultrafine grain structure of αFeSi with typical grain diameters of 10-20 nm. The temperature dependence of saturation magnetization reveals two different magnetic phases which correspond to the α-FeSi grains and the grain boundary phase, respectively. The nanocrystalline material exhibits excellent soft magnetic properties which are discussed within the framework of the random anisotropy model
Keywords :
boron alloys; copper alloys; crystal microstructure; iron alloys; magnetic properties of fine particles; niobium alloys; silicon alloys; 10 to 20 nm; Fe73.5Cu1Nb3Si13.5B 9; alpha FeSi grains; crystallization temperature; grain boundary phase; grain diameters; grain structure; magnetic phases; magnetism; nanocrystalline ferromagnets; random anisotropy model; soft magnetic properties; temperature dependence of saturation magnetization; ultrafine grain structure; Amorphous magnetic materials; Amorphous materials; Annealing; Iron; Magnetic anisotropy; Magnetic materials; Niobium; Perpendicular magnetic anisotropy; Saturation magnetization; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
