Title :
A Mossbauer study of spring magnets
Author :
Sorescu, Monica ; Grabias, A. ; Valeanu, M.
Author_Institution :
Dept. of Phys., Duquesne Univ., Pittsburgh, PA, USA
Abstract :
Several compositions of the NdxFe100-x-yBy system have been prepared in amorphous ribbon form by a melt spinning method. The Nd and B contents x and y increased from 7.3 and 3.6 to 11 and 6, respectively. The alloys were annealed under optimized conditions to obtain a composite material consisting of the hard magnetic Nd2Fe14B and soft magnetic α-Fe phases. Phase analysis was performed using Mossbauer spectroscopy as the primary technique. The hyperfine magnetic fields and site populations of the component phases were determined and discussed. All spring magnet compositions were checked by hysteresis loop measurements.
Keywords :
Mossbauer effect; amorphous magnetic materials; annealing; boron alloys; exchange interactions (electron); ferromagnetic materials; grain size; hyperfine interactions; iron alloys; magnetic hysteresis; melt spinning; nanocomposites; neodymium alloys; permanent magnets; soft magnetic materials; B contents; Mossbauer study; Nd contents; Nd2Fe14B; NdxFe100-x-yBy; NdxFe100-x-yBy system; amorphous ribbon form; component phases; composite material; compositions; exchange coupled material; hard magnetic Nd2Fe14B phase; hyperfine magnetic fields; hysteresis loop measurements; melt spinning method; optimized conditions; phase analysis; site populations; soft magnetic α-Fe phase; spring magnet compositions; spring magnets; Amorphous magnetic materials; Amorphous materials; Annealing; Iron alloys; Magnetic field measurement; Magnets; Neodymium; Soft magnetic materials; Spinning; Springs;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.815760
