Title :
Magnetic properties and structure of nitrogenated La(Co1-x Fex)13 compounds (x=0-0.4)
Author :
Huang, M.Q. ; Zheng, Y. ; Miller, K. ; Elbicki, J. ; Wallace, W.E. ; Sankar, S.G.
Author_Institution :
Advanced Materials Corp., Pittsburgh, PA, USA
fDate :
9/1/1992 12:00:00 AM
Abstract :
La(Co1-xFex)13 (x=0-0.4) alloys have been found to absorb substantial amounts of nitrogen. The unit cell volumes were increased by 8.3-8.9% after nitrogenation. Curie temperature and magnetic moment are decreased by nitrogenation. This negative effect of nitrogenation on magnetic properties in the La(CoFe) 13 system is ascribed to the weakening of exchange when the interatomic spacing is increased by nitrogenation. It is concluded that properties of significance for permanent magnet fabrication are degraded by nitrogenation
Keywords :
Curie temperature; cobalt alloys; ferromagnetic properties of substances; iron alloys; lanthanum alloys; magnetic moments; permanent magnets; Curie temperature; La(Co1-xFex)13; exchange weakening; interatomic spacing; magnetic moment; magnetic properties; nitrogenation; permanent magnet fabrication; unit cell volumes; Anisotropic magnetoresistance; Cobalt alloys; Elementary particle exchange interactions; Iron alloys; Magnetic field measurement; Magnetic moments; Magnetic properties; Powders; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
