Title :
Magnetic properties of Co70.4Fe4.6Si15 B10 surfactant assisted ball milled amorphous powders
Author :
Kaczmarek, W.A. ; Bramley, R. ; Calka, A. ; Ninham, B.W.
Author_Institution :
Australian Nat. Univ., Canberra, ACT, Australia
fDate :
9/1/1990 12:00:00 AM
Abstract :
Attention is given to problems of the interaction of surfactant (SFT) molecules and ferromagnetic metal particles via polar/apolar contacts. In particular, the influence of anionic and cationic SFT in water-based systems on the changes of magnetic characteristics and particle shape is studied. For the experiments the Co70.4Fe 4.6Si15B10 composition was selected because of its soft magnetic properties and low value of the magnetostriction coefficient. Ferromagnetic resonance (FMR) and vibrating sample magnetometry (VSM) were used to analyze the details of the grinding process as well as the influence of the surfactants on the structure, morphology, and magnetic properties. The magnetic data are compared with microstructure and macrostructure, determined from transmission electron micrographs and selected-area electron diffraction patterns. A strong influence of different surfactants and milling times on the particle shape, magnetic saturation, and anisotropy was observed
Keywords :
boron alloys; cobalt alloys; electron diffraction examination of materials; ferromagnetic resonance; iron alloys; magnetic anisotropy; magnetic properties of amorphous substances; magnetic properties of fine particles; noncrystalline state structure; silicon alloys; transmission electron microscope examination of materials; Co70.4Fe4.6Si15B10; anisotropy; ferromagnetic metal particles; ferromagnetic resonance; macrostructure; magnetic properties; magnetic saturation; magnetostriction coefficient; microstructure; milling; morphology; selected-area electron diffraction patterns; soft magnetic properties; structure; surfactant assisted ball milled amorphous powders; transmission electron micrographs; vibrating sample magnetometry; water-based systems; Electrons; Iron; Magnetic anisotropy; Magnetic properties; Magnetic resonance; Magnetostriction; Perpendicular magnetic anisotropy; Saturation magnetization; Shape; Soft magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
