Title :
Crystallization behavior and Mossbauer studies of the R6-(Fe,Nb)88-B6 alloys with R=Nd, Pr, Dy
Author :
Papaefthymiou, V. ; Moukarika, A. ; Withanawasam, L. ; Hadjipanayis, G.C.
Author_Institution :
Dept. of Phys., Ioannina Univ., Greece
fDate :
7/1/2001 12:00:00 AM
Abstract :
We have prepared a new series of R-Fe-B alloys with R=Nd, Pr, and Dy having the Y3Fe62B14 structure using the melt-spinning technique. This metastable phase when annealed at higher temperatures transforms to the R2Fe14B1+α-Fe phase. We have studied the crystallization behavior of these alloys. 57Fe Mossbauer studies have shown that the as-spun samples were amorphous and the ribbons annealed at 600-620°C contain the metastable Y3 Fe62B14 type structure with α-Fe. The analysis of the Mossbauer spectra of the R3Fe62B 14 phases has yielded average hyperfine fields of 229 kG at 295 K and 315 kG at 17 K
Keywords :
Mossbauer effect; annealing; boron alloys; crystallisation; dysprosium alloys; ferromagnetic materials; hyperfine interactions; iron alloys; melt spinning; neodymium alloys; niobium alloys; praseodymium alloys; 600 to 620 C; Dy6(FeNb)88B6; Mossbauer spectra; Nd6(FeNb)88B6; Pr6(FeNb)88B6; R6(Fe,Nb)88B6; amorphous phase; annealing; composite magnet; crystal structure; hyperfine field; melt spinning; metastable phase; rare earth-transition metal intermetallic compound; Annealing; Crystalline materials; Crystallization; Iron alloys; Magnetic analysis; Magnetic materials; Metastasis; Neodymium; Niobium alloys; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
