Magnetic and Microstructure Study of Thin Films of FeCuNbMoSiB FINEMET Alloy

Abstract:

Thin films of FeCuNbMoSiB have been sputtered on Corning glass substrates with thicknesses varying from 10 to 200 nm with post annealing at 450 °C and 550 °C. Annealing in the presence of the magnetic field applied along the plane of a substrate develops an uniaxial magnetic anisotropy with the in-plane easy axis. Estimation of the effective anisotropy constant from the magnetization measurements gave K_eff = 3.23 kJ/m³. Structure and surface of the films were investigated with the X-ray powder diffraction (XRD), resistivity measurements, and Raman spectroscopy. XRD and resistivity analyses show that thermal annealing at 550 °C improves the crystalline fraction and Fe-Si grain size. Raman spectra identified hematite, goethite, magnetite, as well as graphite contamination of film surfaces.

• Periodical: Materials Science Forum (Volume 870)
• Pages: 322-327
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.870.322
• Online since: September 2016
• Authors: I.A. Zakharchuk*, E. Mikhalitsyna, Erkki Lähderanta
• Keywords: FINEMET, Magnetization, Soft Magnetic Materials, Thin Films

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