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Magnetoimpedance, magnetoinductance and AC magnetoresistance studies on amorphous and nanocrystalline ribbons

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Abstract

A systematic investigation of the influence of Al and V on the magnetoimpedance (MI), magnetoinductance (mi) and AC Magnetoresistance (ACMR) effect in melt-spun Fe73.5Si13.5B8CuNb(3−x)VxAl (x=0,1,1.5,3) ribbons has been performed in the frequency range 500 kHz — 13 MHz and under dc magnetic field (H ext ) up to 60 Oe. Nanocrystals of α-FeSi were observed, when annealed at 500°C in vaccum. MI, mi and ACMR were measured using impedance analyzer. Largest peak mi, MI and ACMR of 1615%, 61% and 69% were observed for the nanocrystalline x=1.0 ribbon, at 100 kHz, 10 MHz and 13 MHz respectively. Magnetic domain structure was studied in the ribbons through magnetic force microscopy.

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Authors and Affiliations

  1. Advanced Magnetic Materials Laboratory, Department of Physics, Indian Institute of Technology Madras, Chennai, 600 036, India

    Sandhya Dwevedi & G. Markandeyulu

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  1. Sandhya Dwevedi
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  2. G. Markandeyulu
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Correspondence to Sandhya Dwevedi.

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Dwevedi, S., Markandeyulu, G. Magnetoimpedance, magnetoinductance and AC magnetoresistance studies on amorphous and nanocrystalline ribbons. Trans Indian Inst Met 64, 227 (2011). https://doi.org/10.1007/s12666-011-0045-1

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  • DOI: https://doi.org/10.1007/s12666-011-0045-1

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