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(Color online) Structural characterization of Mn3− x Co x Ga. The XRD patterns and Rietveld refinements are shown for a cubic (Mn2CoGa) and a tetragonal composition (Mn2.7Co0.3Ga) together with the corresponding unit cells. The cell volumes of tetragonal and cubic alloys in dependency on x are shown together with the corresponding linear fits in (c).
(Color online) Magnetic properties of Mn3− x Co x Ga. The experimentally determined saturation magnetic moments at T = 5 K are compared to different types of linear dependencies shown as full lines for cubic (Slater-Pauling-curve) and dashed lines for tetragonal alloys in (a). Tetragonal and cubic compounds are represented by circles and squares, respectively. Heights and widths of the inserted hysteresis loops correspond to the factual ratios. The T C of all alloys is plotted in (b).
Structural and magnetic properties of the Mn3− x Co x Ga alloys. The lattice parameters were determined at room temperature. V is the volume of the unit cell, and m is the magnetic moment measured at 5 K in a magnetic induction field of 5 T, i.e., in or close to magnetic saturation. H c is the coercive field, and B r the magnetic remanence, both determined at 5 K.
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