Title :
High coercivity in Sm(FeT)12 type magnets
Author :
Strzeszewski, J. ; Wang, Y.Z. ; Singleton, E.W. ; Hadjipanayis, G.C.
Author_Institution :
Dept. of Phys., Kansas State Univ., Manhattan, KS, USA
fDate :
9/1/1989 12:00:00 AM
Abstract :
The magnetic properties and microstructure of melt-spun iron-rich ternary alloys with the ThMn12-type structure are reported. Rapidly quenched samples were prepared with composition SmxFe yTz, where T=Ti, V, Mo, Cu, Al, Si or a mixture of these, and 8<x<20, 76<y<89, and 6<z<12. Some samples has small amounts of B or C added. The results of X-ray diffraction, electron microscopy, and thermomagnetic measurements showed that the crystallized alloys have the ThMn12-type structure when annealed above 800°C. For lower annealing temperatures, some alloys have the TbCu7-type structure. The maximum coercivity obtained was 7.7 kOe, and several samples with composition Sm-Fe-Ti-B and Sm-Fe-Ti-(Si,Al) had Hc>6.5 kOe
Keywords :
coercive force; ferromagnetic properties of substances; iron alloys; samarium alloys; 800 C; Sm(FeAl)12; Sm(FeCu)12; Sm(FeMo)12; Sm(FeSi)12; Sm(FeTi)12; Sm(FeV)12; TbCu7-type structure; ThMn12-type structure; X-ray diffraction; annealing; crystallized alloys; electron microscopy; magnetic properties; microstructure; rapid quenching; thermomagnetic measurements; Amorphous materials; Annealing; Boron; Coercive force; Crystallization; Grain size; Magnets; Optical microscopy; Temperature dependence; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
