The equiatomic FeAl alloy has been modified by partial substitution of Mn for Fe, and its magnetic and structural properties investigated by neutron diffraction (ND), x-ray absorption fine structure (XAFS) spectroscopy, Mössbauer spectroscopy (MS), and SQUID magnetometry both for the ordered (B2) and disordered states. The unit cell volume is measured to increase linearly with Mn concentration. XAFS measurements indicate local structural displacements occur at the Mn sites in both ordered and disordered states that may act to frustrate long-range magnetic order (LRMO). Although MS and ND show no evidence of LRMO, SQUID magnetometry indicates an induced movement in the ordered state that increases with disorder but does not saturate at fields up to 5 T.
V. G. Harris et al., "Atomic Structure and Magnetism of Ordered and Disordered Al₀.₅Fe₀.₅₋ₓMnₓ Alloys," Journal of Applied Physics, vol. 85, no. 8, pp. 5181-5183, American Institute of Physics (AIP), Apr 1999.
The definitive version is available at http://dx.doi.org/10.1063/1.369117
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