Title :
Magnetic properties of SrO·nFe2O3 (0.5<n<6.0) and phase diagram in SrO-Fe2O3 system
Author :
Kagotani, T. ; Sugimoto, S. ; Okada, M. ; Homma, M.
Author_Institution :
Dept. of Mater. Sci., Tohoku Univ., Sendai, Japan
fDate :
11/1/1995 12:00:00 AM
Abstract :
Ferrite compound of the chemical composition SrO·nFe2 O3 (2.0<n<6) showed high magnetic properties comparable to that of SrO·6Fe2O3 (M-ferrite). The saturation magnetisation Ms is 50~75 emu/g in the range of n=6.0~2.0. Coercive force iHc is 2.4 kOe near n=6.0~6.5 and n=1.5. Furthermore, SrO·nFe2O3 indicated hexagonal (M-type) orthorhombic and tetragonal phases in the range of n=6.5~2.0, 2.0~0.5 and less than 0.5, respectively. The fact means that a new magnetic phase is in existence near n=1.0~2.0. Also, it is never recognized that the compound of chemical formula 3Sr0·2Fe2 O3, which is described in the current phase diagram and have been prevailed for more than two decades, is in existence
Keywords :
coercive force; ferrites; magnetic structure; magnetisation; phase diagrams; solid-state phase transformations; strontium compounds; SrO-Fe2O3; SrO-Fe2O3 system; coercive force; ferrite compound; hexagonal; magnetic properties; orthorhombic; phase diagram; saturation magnetisation; tetragonal; Chemical compounds; Coercive force; Ferrimagnetic materials; Ferrites; Magnetic field measurement; Magnetic materials; Magnetic properties; Powders; Saturation magnetization; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
