title: Ferrimagnetism in GdCo(12-x)Fe(x)B6.
abstract: The effects of iron substitution on the structural and magnetic properties of the GdCo(12-x)Fe(x)B6 (0 ≤ x ≤ 3) series of compounds have been studied. All of the compounds form in the rhombohedral SrNi12B6-type structure and exhibit ferrimagnetic behaviour below room temperature: T(C) decreases from 158 K for x = 0 to 93 K for x = 3. (155)Gd Mössbauer spectroscopy indicates that the easy magnetization axis changes from axial to basal-plane upon substitution of Fe for Co. This observation has been confirmed using neutron powder diffraction. The axial to basal-plane transition is remarkably sensitive to the Fe content and comparison with earlier (57)Fe-doping studies suggests that the boundary lies below x = 0.1.
authors.affiliation: Institut Néel, CNRS and Université Joseph Fourier, Grenoble, France.
authors.forename: L V B
authors.initials: LV
authors.lastname: Diop
authors.forename: O
authors.initials: O
authors.lastname: Isnard
authors.forename: N R
authors.initials: NR
authors.lastname: Lee-Hone
authors.forename: D H
authors.initials: DH
authors.lastname: Ryan
authors.forename: J M
authors.initials: JM
authors.lastname: Cadogan