We report on the synthesis of amorphous ultrafine powder of Fe10Mn70B20 by reduction of transition metal ions in a NaBH4 aqueous solution, the morphological-structural characterization and its magnetic properties. The sample consists of both very fine needles, which form skeins, and chains of spherical particles. Magnetization measurements show a progressive blocking of interacting superparamagnetic nanodomains with decreasing temperature. The effect of aging and thermal annealing on the magnetic properties is discussed.
Structure and Magnetic properties of Amorphous Fe10Mn70B20 Ultrafine Powder
1999
Abstract
We report on the synthesis of amorphous ultrafine powder of Fe10Mn70B20 by reduction of transition metal ions in a NaBH4 aqueous solution, the morphological-structural characterization and its magnetic properties. The sample consists of both very fine needles, which form skeins, and chains of spherical particles. Magnetization measurements show a progressive blocking of interacting superparamagnetic nanodomains with decreasing temperature. The effect of aging and thermal annealing on the magnetic properties is discussed.File in questo prodotto:
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