Title :
Magnetic properties of the Sm20Fe70Ti10 -ω-phase
Author :
Katter, M. ; Wecker, J. ; Schultz, L.
Author_Institution :
Siemens AG, Erlangen, West Germany
fDate :
9/1/1990 12:00:00 AM
Abstract :
The magnetic properties of the hard magnetic 20:70:10 (ω) phase in melt-spun Sm20Fe70+xTi10-x ( x=-2, 0, and 2) and Sm25Fe65.6Ti9.4 were investigated. The intrinsic coercivity, Hci , and the remanence were measured from room temperature up to the Curie temperature. The maximum coercivities, Hci, at room temperature for the compositions Sm20Fe70Ti 10 and Sm25Fe65.6Ti9.4 are 35.6 and 46.4 kA/cm, respectively. The temperature dependence of the coercive field is compared with that of melt-spun Dy2Fe14B, and the anisotropy field of ω at room temperature is roughly estimated to be greater than 200 kA/cm. The Curie temperature of the ω phase is between 293 and 320°C as revealed by magnetic and calorimetric measurements. The formation of ω and related phases by crystallization of amorphous ribbons is discussed
Keywords :
Curie temperature; coercive force; ferromagnetic properties of substances; iron alloys; magnetic anisotropy; permanent magnets; remanence; samarium alloys; titanium alloys; 293 to 320 degC; Curie temperature; Sm20Fe70+xTi10-x; Sm25Fe65.6Ti9.4; anisotropy field; coercive field; intrinsic coercivity; magnetic properties; remanence; room temperature; temperature dependence; Amorphous magnetic materials; Anisotropic magnetoresistance; Coercive force; Iron; Magnetic anisotropy; Magnetic properties; Perpendicular magnetic anisotropy; Remanence; Temperature dependence; Temperature measurement;
Journal_Title :
Magnetics, IEEE Transactions on
