Title :
57Fe Mossbauer investigation of R2(Fe1-x Cox)17Ny (R=rare earth, x⩽0.4, y⩽2.2)
Author :
Ardisson, J.D. ; Bogé, M. ; Persiano, A.I.C. ; Colucci, C.C. ; Gama, S.
Author_Institution :
Dept. de Fisica, Univ. Federal do Minas Gerais, Brazil
fDate :
9/1/1992 12:00:00 AM
Abstract :
The effects of different contents of nitrogen in both Pr2 Fe17 and Nd2Fe17 and of cobalt in both Nd2Fe17 and Nd2Fe17N 2.2 are investigated by means of Mossbauer spectroscopy and thermal magnetic analysis. The results confirm that either nitrogen or cobalt increases the hyperfine field (Bhf) as well as the Curie temperature (Tc) of the material. The hyperfine parameters for nominal contents of nitrogen above y=1.5 are the same as those observed in fully nitrided samples. The data also reveal that the combination of N and Co produces an additional increase of Tc. The same behavior is observed in Bhf of Nd2(Fe1-xCo x)17N2.2 in the range 0<x <0 0.1. After a restricted maximum at x≃0.02-0.05, Bhf decreases with increasing x
Keywords :
Curie temperature; Mossbauer effect; cobalt alloys; crystal hyperfine field interactions; ferromagnetic properties of substances; iron alloys; neodymium alloys; nitridation; permanent magnets; praseodymium alloys; Curie temperature; Mossbauer spectroscopy; Nd2(Fe1-xCox)17N y; Pr2(Fe1-xCox)17N y; arc melting; thermal magnetic analysis; Anisotropic magnetoresistance; Earth; Iron; Lattices; Magnetic materials; Magnetization; Neodymium; Nitrogen; Paramagnetic materials; Permanent magnets;
Journal_Title :
Magnetics, IEEE Transactions on
