MAGNETIC-PROPERTIES OF SINGLE-CRYSTAL Y-3(FE0.93V0.07)(29)

We have successfully prepared a Y-3(Fe0.93V0.07)(29) Single crystal by the Czochralski method followed by an appropriate annealing procedure . The spontaneous magnetization lies in the(1 0 2)-plane over the inve stigated temperature range of 5-300 K. The Curie temperature is T-c = 439 K. The saturation magnetization at 5 K is M-s = 48.3 mu(B)/f.U. wh ich corresponds to an average Fe magnetic moment of 1.79 mu(B). The un iaxial anisotropy K-1 of Fe-sublattice at T = 5 K is -2.25 MJ/m(3). W e observed no easy magnetization direction within the (1 0 2)-plane wh ich may be due to the coexistence of Y-3(Fe,V)(29) crystallites, orien ted to each other at a relative angle of theta = 60 degrees about the [1 0 2] axis. This feature has been well explained with a six-domain m odel in terms of the anisotropy constants K-i(T) of the iron sublattic e of the monoclinic 3:29 structure. (C) 1998 Elsevier Science B.V. All rights reserved.