  To investigate structure-property correlations, high-coercivity MnxGa
nanoparticles were synthesized by the method of sequential deposition of Ga and
Mn fluxes using molecular beam epitaxy. Spontaneous nanostructuring was
assisted by the use of an Au precursor and thermal annealing, and the growth
properties, structure and magnetic properties were characterized. Atomic force
microscopy revealed average particle dimensions of 100 nm and X-ray diffraction
revealed a dominant tetragonal D022 crystal structures. Magnetic
characterization at room temperature identified the presence of two magnetic
phases, dominated by a high-coercivity (2.3 T) component in addition to a
low-coercivity component.
