Abstract

Magnetic inelastic scattering studies have been performed as a function of temperature on ErFe2 (1), HoFe2 (2) and TbFe2. All the heavy rare earth iron compounds of composition RFe2 crystallize in the C15 Laves phase structure with lattice constants a ≈ 7.3 A They have Curie temperatures in the range 575 K to 700°K and exhibit a ferrimagnetic alignment of iron and rare earth spins. The iron moment is typically 1.5 µBand the rare earth has the full free ion moment at 0 K.

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