Amorphous transition metal-metalloid alloy particles can be prepared by chemical preparation techniques. We discuss the preparation of transition metal-boron and iron-carbon particles and their magnetic properties. Nanometer-sized particles of both crystalline and amorphous magnetic materials are superparamagnetic at finite temperatures. The temperature dependence of the superparamagnetic relaxation time and the influence of inter-particle interactions is discussed. Finally, some examples of studies of surface magnetization of alpha-Fe particles are presented.
|Title of host publication||Proceedings of the Vth International Workshop on Non-Crystalline Solids|
|Place of Publication||Santiago de Compostela, Spain|
|Publisher||R. Rivas and M.A. Lopez-Quinteia|
|Publication status||Published - 1997|