TY CONF TI THE FORMATION OF THE PHYSICAL PROPERTIES OF MAGNETIC MATERIALS FOR ROTORS OF HIGH-SPEED AND ULTRA HIGH-SPEED ELECTROMECHANICAL ENERGY CONVERTERS KW materials KW rotor KW hysteresis Electromechanical converters JO XXIV international conference "Electromagnetic field and materials (fundamental physical research)" AU Milyaev, I.. AU Ostanin, S.. AU Cuy, S.. AU Go, V.. PY 2025 PB INFRA-M Academic Publishing LLC.