Title :
Magnetization curves of a Tb3(Fe,V)29 single crystal
Author :
Courtois, D. ; Li, H.S. ; Cadogan, J.M. ; Givord, D. ; Bourgeat-Lami, E.
Author_Institution :
New South Wales Univ., Sydney, NSW, Australia
fDate :
9/1/1997 12:00:00 AM
Abstract :
A Tb3(Fe,V)29 single crystal has been grown using the Czochralski method. Magnetization measurements along the hard axis of the crystal are presented. At low temperatures, a first-order magnetization process of type II occurs at large critical fields (μ 0Hc=10.6 T at T=5 K). The data were analysed using the first-principle model in terms of exchange and crystal-field interactions. The second order crystal-field coefficients of two rare earth sites are estimated to be A20=-36K.a0-2 for the 4i site, and A20=+16K.a0-2 for the 2a site
Keywords :
Curie temperature; crystal field interactions; crystal growth from melt; exchange interactions (electron); ferromagnetic materials; iron alloys; magnetic anisotropy; magnetisation; terbium alloys; vanadium alloys; Curie temperature; Czochralski method; Tb3(Fe,V)29 single crystal; Tb3(FeV)29; crystal-field interactions; exchange; first-order magnetization process; first-principle model; hard axis; large critical fields; low temperatures; magnetization curves; rare earth sites; second order crystal-field coefficients; type II; Anisotropic magnetoresistance; Annealing; Atomic measurements; Iron; Magnetic anisotropy; Magnetic field measurement; Magnetization; Neodymium; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
