INVESTIGADORES
SIRKIN Hugo Ricardo Mario
artículos
Título:
Amorphous and nanocrystalline fraction calculus for the
Autor/es:
MURACA, D.; MOYA, J.A.; CREMASCHI, V.J.; SIRKIN, H.R.M.
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
Elsevier Science
Referencias:
Año: 2007 vol. 398 p. 325 - 328
ISSN:
0921-4526
Resumen:
We studied the relationship between the saturation magnetization (MS) of the Fe73.5Si3.5Ge10Nb3B9Cu1 alloy and its nanocrystalline structure. Amorphous ribbons obtained by the melt spinning technique were heat-treated for 1 h at different temperatures. The optimal treatment to obtain a homogeneous structure of e3(Si,Ge) nanocrystals with a grain size of around 10 nm embedded in an amorphous matrix involved heating at 540 1C for 1 h. We calculated the magnetic contribution of the nanocrystals to the heat treated alloy using a linear model and measured the MS of the Fe73.5Si3.5Ge10Nb3B9Cu1 nanocrystalline and of an amorphous alloy of the same composition of the amorphous matrix: Fe58Si0.5Ge3.5Cu3Nb9B26. Using experimental data and theoretical calculations, we obtained the amorphous and crystalline fraction of the heat-treated ribbons.
r 2007 Elsevier B.V. All rights reserved.
