Title :
Magnetic and structural properties of nano-sized Sm-FeCo-B particles
Author :
Sasaki, Y. ; Tsuboi, S. ; Kasajima, N. ; Kitahata, S. ; Kishimoto, M.
Author_Institution :
Tsukuba Res. Lab., Hitachi Maxell Ltd., Ibaraki, Japan
fDate :
7/1/2001 12:00:00 AM
Abstract :
Nano-sized FeCo particles containing Sm and B are prepared by a co-precipitation method. Each particle has a spherical shape with a diameter of about 20 nm and a core-shell structure. The core and shell mainly consist of the FeCo alloy and oxides containing Sm and B, respectively. The thickness of surface layer is only about 1 nm. The lattice spacing of the core part Is estimated to be 2.0 Å which corresponds to that of (110) plane of bcc FeCo alloy. The saturation magnetization and the coercivity are 164 emu/g and 1420 Oe, respectively. The coercivity is larger than the calculated value (. =.500 Oe) for spherical single domain Fe particles
Keywords :
alloying additions; boron alloys; cobalt alloys; coercive force; iron alloys; magnetic particles; magnetisation; nanostructured materials; samarium alloys; 1 nm; 2 A; Sm-FeCo-B; co-precipitation method; coercivity; core; lattice spacing; magnetic properties; nano-sized Sm-FeCo-B particles; saturation magnetization; shell; structural properties; surface layer thickness; Coercive force; Electrons; Iron; Lattices; Magnetic anisotropy; Magnetic cores; Magnetic properties; Perpendicular magnetic anisotropy; Saturation magnetization; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
