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Zhurnal Tekhnicheskoi Fiziki, 2022 Volume 92, Issue 2, Pages 321–326 (Mi jtf7302)

Physics for sciences of life

Magnetic impedance of film nanostructures for stray magnetic field evaluation of microparticles in magnetic composites

G. Yu. Mel'nikov, V. N. Lepalovskij, G. V. Kurlyandskaya

Ural Federal University named after the First President of Russia B. N. Yeltsin, 20002 Yekaterinburg, Russia

Abstract: Longitudinal giant magnetoimpedance effect of [Fe$_{21}$Ni$_{79}$/Cu]$_5$/Cu/[Fe$_{21}$Ni$_{79}$/Cu]$_5$ film element was investigated depends on stray magnetic field of epoxy magnetic composite with 30% weight concentration of iron oxide magnetic microparticles. Configuration of an experiment was a model of thrombus detection in a blood vessel. Stray magnetic field was varied by movement of a magnetic composite above the element perpendicular to the long side. Composite was either magnetized or not to the state of remanence. As the magnetic composite approaches the GMI element, MI ratio curves are smoothed and shifted along the field axis and maximum value of the MI ratio decreases. Magnetic properties of magnetic composite and film element were investigated as well.

Keywords: magnetoimpedance effect, multilayered film nanostructures, composite materials, biodetection.

Received: 17.09.2021
Revised: 21.10.2021
Accepted: 22.10.2021

DOI: 10.21883/jtf.2022.02.52024.259-21



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