X-ray diffraction studies of the ternary alloys (V,Mn)₂Ga₅

Neutron diffraction, magnetic and superconducting measurements on vanadium–manganese–gallium alloys

“…The alloy Mn2Ga5 has been reported to be ferromagnetic by Wachtel & Nier (1965) whilst the alloy V2Gas has been investigated by van Vucht, Bruning, Donkersloot & Gomes de Mesquita (1964) (who reported it to be superconducting with a broad transition temperature of 3.4°K extending down to 2.1°K), and by Lu & Liang (1965). The ternary alloys (VMn)zGa5 form a complete series of solid solutions, from VzGas to MnzGas, of the MnzHgs structure as shown by Kitchingman & Norman (1972). Their results confirm the view that the dimensions of the structure are mainly determined by the size of the gallium atoms and that these atoms are distorted or show considerable overlap of the p orbitals.…”

Two-Dimensional Superdegeneracy and Structure−Magnetism Correlations in Strong Ferromagnet, Mn2Ga5

“…The title compound, Mn 2 Ga 5 , is quite intriguing in this regard, as it is known to show a strong ferromagnetism even at room temperature and exhibits a magnetic moment of 1.78 μ B /Mn based on neutron diffraction studies. , In fact, the gallide is the only ferromagnetic compound that is thermodynamically stable in the Mn−Ga binary system. The known Mn-richer compounds are either ferrimagnetic or antiferromagnetic, except the metastable δ-MnGa. − Both of other known Ga-rich compounds, MnGa 4 and MnGa 3 , are Pauli-paramagnetic, being consistent with the aforementioned behavior of the p-metal-rich transition metal intermetallics.…”