Study of the families of amorphous soft magnetic tapes with application in sensors, used in the correlation of ionospheric variables with terrestrial magnetic field.

Abstract In the present work we study the amorphous soft magnetic ribbons of Fe73.5-xCrxNb3Cu1Si13.5B9 with x = 0, 2, 4, 6, 8 and 10, [(Fe0.5Co0.5)0.75B0.20Si0.05]96Nb4 and (Fe;Co)70 Nb10B20 content, elaborated by means of the Melt-Spinning technique, in order to evaluate their physical properties,...

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Autores:: Velásquez Salazar, Abilo Andrés

Tipo de recurso:: Doctoral thesis

Fecha de publicación:: 2018

Institución:: Universidad Nacional de Colombia

Repositorio:: Universidad Nacional de Colombia

Idioma:: spa

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Summary:	Abstract In the present work we study the amorphous soft magnetic ribbons of Fe73.5-xCrxNb3Cu1Si13.5B9 with x = 0, 2, 4, 6, 8 and 10, [(Fe0.5Co0.5)0.75B0.20Si0.05]96Nb4 and (Fe;Co)70 Nb10B20 content, elaborated by means of the Melt-Spinning technique, in order to evaluate their physical properties, including magnetic, electrical and thermal. Furthermore, based on these properties, the usefulness of these ribbons is evaluated to be incorporated in tegnological devices such as, fluxgate magnetometers, transformer's core and magnetic cooling tegnologies. The above properties were measured using a set of experimental techniques including vibrating sample magnetometry, Mosbauer spectroscopy, Hall effect, magnetoimpedance, thermal analysis and X-ray difraction. The magnetization set is analyzed through the Berger-Campillo and Kouvel-Fisher methods for the study of critical behavior in the Ferro-Para phase transition. Results are confronted in order to understand the mechanisms associated with magnetic interaction. The relevance of spin-orbit interaction in the results of critical exponents from Hall-effect measurements is argued. We propose a system to measure the sensitivity of these samples in their application as cores of fluxgate configuration magnetic sensors with a computational method.

Study of the families of amorphous soft magnetic tapes with application in sensors, used in the correlation of ionospheric variables with terrestrial magnetic field.

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