ACTA

Joule Heating Preannealing Effect in the Coercivity Field and Magnetostriction Constant of Co₆₆Fe₄Mo₂Si₁₆B₁₂ Alloy

P. Garcia Tello^a, J. González^b, J.M. Blanco^a and R. Żuberek^c
^a Dpto. Fisica Aplicada I, EUITI, San Sebastián, Spain
^b Dpto. Fisica de Materiales, Facultad de CC Quimicas UPV, San Sebastián, Spain
^c Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa, Poland

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The effect of thermal treatments (by the Joule heating and conventional annealing) on the coercivity and saturation magnetostriction constant in the amorphous and nanocrystalline Co₆₆Fe₄Mo₂Si₁₆B₁₂ alloy is reported. It is noticeable the near insensibility to the external stress of coercive field and anisotropy field (leading to extremely low value of magnetostriction 1.5×10^-8) achieved after the Joule heating by two steps (first one to relax the internal stresses and the second one to develop a fine nanocrystalline structure).

DOI: 10.12693/APhysPolA.97.595
PACS numbers: 75.50.Kj, 75.30.Gw, 75.80.+q