Magnetic Structure of Fe<SUB>3</SUB>Ga Studied by Neutron Diffraction

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The magnetic form factor and the magnetic moment per Fe atom (μFe) are determined by neutron diffraction of single crystals. The Fe atoms on the B sublattice with 8 Fe nearest neighbors (NN) have the moment of 2.18 μB and the eg ratio (γ) of 0.60 at 290 K, where γ means the fraction of polarized electrons with the eg symmetry and the remaining (1−γ) have the t2g symmetry. Those on the A and C sites with 4 Fe and 4 Ga NN have the moment of 1.50 μB and γ of 0.48. The results are discussed with reference of the Mössbauer analysis and compared with the moments and internal fields of Fe3Al and Fe3Si.

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