Title :
Crystallographic and magnetic properties of R3Co11 B4(R=Y and Gd) compounds
Author :
Kowalczyk, Andrzej ; Stefanski, P.
Author_Institution :
Inst. of Molecular Phys., Acad. of Sci., Poznan, Poland
fDate :
3/1/1994 12:00:00 AM
Abstract :
The structure and magnetic properties of R3Co11 B4 compounds, where R=Y and Gd are investigated. X-ray analysis reveals that the R3Co11B4 alloys crystallize in the hexagonal Ce3Co11B4 structure. The unit cell of the structure contains 18 atoms. The rare earth atoms are distributed in two different crystallographic sites, the Co atoms in three different positions and B is located in one type of site. The lattice constants, Curie temperature and saturation magnetization at 4.2 K are determined. The mean field approximation yields a 4f-3d exchange integral of JRCo/kB=-20.9 K. The properties of these compounds are compared with those of R-Co alloys
Keywords :
Curie temperature; boron alloys; cobalt alloys; crystal atomic structure of alloys; exchange interactions (electron); gadolinium alloys; magnetisation; yttrium alloys; 4.2 K; 4f-3d exchange integral; Curie temperature; Gd3Co11B4; X-ray diffraction; Y3Co11B4; hexagonal Ce3Co11B4 structure; lattice constants; mean field approximation; saturation magnetization; Anisotropic magnetoresistance; Crystallization; Crystallography; Lattices; Magnetic anisotropy; Magnetic materials; Magnetic properties; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
