1
John J Croat: High coercivity rare earth-iron magnets. General Motors Corporation, E F Harasek, January 29, 1985: US04496395 (50 worldwide citation)

Ferromagnetic compositions having intrinsic magnetic coercivities at room temperature of at least 1,000 Oersteds are formed by the controlled quench of molten rare earth-transition metal alloys. Hard magnets may be inexpensively formed from the lower atomic weight lanthanide elements and iron.


2
Croat John J: Aimants de forte puissance faits de terre rare et de fer, High coercivity rare earth-iron magnets. Magnequench International, GOWLING LAFLEUR HENDERSON, April 8, 1986: CA1202864

HIGH COERCIVITY RARE EARTH-IRON MAGNETS Abstract of the Disclosure Ferromagnetic compositions having intrinsicmagnetic coercivities at room temperature of at least1,000 Oersteds are formed by the controlled quench ofmolten rare earth-transition metal alloys. Hardmagnets may be inexpensively formed f ...