Title :
Syntheses and magnetic properties of Nd3Co13-xNixB2 borides
Author :
Yi Chen ; Li, X. ; Liang, J.K. ; Chen, X.L. ; Shen, B.G. ; Rao, G.H. ; Liu, Q.L.
Author_Institution :
Sch. of Electr. & Comput. Eng., Purdue Univ., West Lafayette, IN, USA
fDate :
7/1/2000 12:00:00 AM
Abstract :
The effect of substitution of Ni for Co in the borides Nd3 (Co13-xNix)B2 (x=0, 1, 2, 3, 4, 5) on the crystal structure and magnetic properties has been investigated. The lattice parameter a decreases while c increases with increasing x in the range 0⩽x⩽5. The Curie temperature and saturation magnetic moment per formula unit in Nd3(Co13-xNix)B2 decrease monotonically as the Ni concentration increases. We have observed spin-reorientation transitions at temperatures that decrease monotonically with increasing Ni concentration. It is noteworthy that the substitution of Ni has a significant effect on the magnetocrystalline anisotropy of the Co sublattice, leading to the change of easy magnetization direction of Nd3(Co13-x Nix)B2 compounds from basal plane to the c axis at room temperature when x⩾2. The magnetic phase diagram of the Nd3(Co13-xNix)B2 borides is given, and the behavior of magnetocrystalline anisotropy is analyzed by the single ion model
Keywords :
Curie temperature; boron alloys; cobalt alloys; crystal structure; ferromagnetic materials; lattice constants; magnetic anisotropy; magnetic moments; magnetic transitions; neodymium alloys; nickel alloys; Curie temperature; Nd3(CoNi)13B2; Nd3Co13-xNixB2 boride; crystal structure; lattice parameter; magnetic phase diagram; magnetic properties; magnetization easy axis; magnetocrystalline anisotropy; saturation magnetic moment; single ion model; spin reorientation transition; substitution; synthesis; Anisotropic magnetoresistance; Lattices; Magnetic analysis; Magnetic anisotropy; Magnetic moments; Magnetic properties; Neodymium; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
