Published

2012-07-01

COMPORTAMIENTO MAGNÉTICO Y EFECTO DE MAGNETO-IMPEDANCIA EN CINTAS DE CoFeBSi

MAGNETIC BEHAVIOR AND MAGNETO-IMPEDANCE EFFECT IN CoFeBSi RIBBONS

Keywords:

Aleaciones magneticas blandas, comportamiento magnetico, efecto de magneto-impedancia gigante. (es)
Soft ferromagnetic alloys, magnetic behavior, giant magneto-impedance effect. (en)

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Authors

  • Abilo A. Velasquez Laboratorio de Magnetismo y Materiales Avanzados, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia, Sede Manizales, Manizales, Colombia. Departamento de Ingeniera Electrica, Electronica y Computacion, Facultad de Ingeniera
  • Monica Gomez Hermida Departamento de Ciencias Basicas, Universidad Catolica de Pereira, Pereira, Colombia y Facultad de Minas, Universidad Nacional de Colombia, Sede Medelln, Medelln, Colombia.
  • Andres Rosales Rivera Laboratorio de Magnetismo y Materiales Avanzados, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Colombia, Sede Manizales, Manizales, Colombia

En este trabajo, presentamos medidas de magnetización dc, susceptibilidad ac e impedancia en cintas de la aleación amorfa Co80-xFexB10Si10 con x = 0, 6, 8 y 10 %.at. Esas medidas indican que a temperatura ambiente esas muestras tienen buen comportamiento magnético blando incluyendo el efecto de magneto-impedancia gigante. La parte real de la susceptibilidad ac, χ’ac, revela un campo de irreversibilidad, Hirr, el cual corresponde al campo de anisotropía transversal, Hk, donde la razón de la magneto-impedancia alcanza su valor máximo. 

In this paper we present dc magnetization, ac susceptibility and impedance measurements on amorphous alloy ribbons Co80-xFexB10Si10 with x = 0, 6, 8 and 10 at.%. They indicate that at room temperature these samples have good soft magnetic behavior including the giant magneto-impedance effect. The real part of the ac susceptibility χ’ac reveals an irreversibility field, Hirr, which corresponds to the transverse anisotropy field, Hk, at which the magneto-impedance ratio reaches its maximum value.

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