Effects of average grain size on the magnetic properties of permalloy films Nikolay Djuzhev, Aleksey Iurov, Nikita Mazurkin, Maksim Chinenkov, Aleksey Trifonov and Marina Pushkina EPJ Web Conf., 185 (2018) 01003 Published online: 04 July 2018 DOI: 10.1051/epjconf/201818501003