Microwave and magneto-optic properties of ε-Fe2O3 nanoparticles arising in borate glasses doped with Fe and GdOxana Ivanova, Janis Kliava, Irina Edelman, Ruslan Ivantsov and Eleonora PetrakovskajaEPJ Web Conf., 185 (2018) 03011DOI: https://doi.org/10.1051/epjconf/201818503011