Magnetic properties and giant magnetoimpedance of surface modified Co-based amorphous ribbons with carbon coveringElizaveta V. Golubeva, Anna A. Chlenova, Elena A. Stepanova and Galina V. KurlyandskayaEPJ Web Conf., 185 (2018) 10001DOI: https://doi.org/10.1051/epjconf/201818510001