Title :
High coercivities in Sm-Fe-Tm magnets
Author :
Schultz, L. ; Schnitzke, K. ; Wecker, J. ; Katter, M.
Author_Institution :
Siemens AG, Erlangen, West Germany
fDate :
9/1/1990 12:00:00 AM
Abstract :
High coercivities have been obtained in three Sm-Fe-TM phases (TM=V, Ti, Zr) prepared by mechanical alloying and a subsequent heat treatment at relatively low temperatures. In Sm-Fe-V with the ThMn12 crystal structure, coercivities up to 11.8 kOe were achieved; in Sm-Fe-Zr with the PuNi3 crystal structure, coercivities up to 14.8 kOe were achieved; and in ω-phase Sm-Fe-Ti, giant coercivities up to 64 kOe (at room temperature) were achieved. The temperature dependence of the coercivity also differs favorably from that of Nd-Fe-B
Keywords :
coercive force; ferromagnetic properties of substances; iron alloys; permanent magnets; samarium alloys; titanium alloys; vanadium alloys; zirconium alloys; Sm-Fe-Ti; Sm-Fe-V; Sm-Fe-Zr; giant coercivities; high coercivity; temperature dependence; Alloying; Amorphous magnetic materials; Anisotropic magnetoresistance; Coercive force; Heat treatment; Magnetic anisotropy; Magnetic properties; Permanent magnets; Perpendicular magnetic anisotropy; Saturation magnetization;
Journal_Title :
Magnetics, IEEE Transactions on
