Magnetic properties of acicular ultrafine iron particles

Magnetic properties of acicular (similar to60 and similar to200 nm) iron particles, obtained by reduction of alumina-coated goethite particles, are reported. X-ray diffraction and Mossbauer spectroscopy showed that the particles consist of a alpha-Fe core and a thin surface layer of maghemite. Magnetization data indicated an improvement of similar to28% in the saturation magnetization, coercive field, and squareness for particles with similar to60 nm. This magnetic property enhancement of the present particles, whose size is 40% smaller than those commercially available, could result in a similar decrease of the bit-size for higher density of magnetic media

The Change In Magnetic Properties Of Fe3al Compound Due To Substitution Of Fe By Co

The magnetic moment using self-consistent spin-polarized energy band calculations of Fe3Al and Fe2CoAl Heusler phases are presented. These results are compared with the experimental values obtained from the magnetization curves of these materials. © 2004 Elsevier B.V. All rights reserved.272-276769770Ayuela, A., Enkovaara, J., Ullakko, K., Niemien, R.M., (1999) J. Phys.: Condens. Matter, 11, p. 2017Buschow, K.H.J., (1977) Rep. Prog. Phys., 40, p. 1179Blaha, P., Schwarz, K., Luitz, J., WIEN 97 Vienna University of Technology, , This is an improved and updated Unix version of the copyrighted WIEN codeBlaha, P., Schwarz, K., Sorantin, P., Trickey, S.B., (1990) Comput. Phys. Commun., 59, p. 399Perdew, J.P., Burkeand, S., Ernzerhof, M., (1996) Phys. Rev. Lett., 77, p. 1