Abstract
The B2/L2 1 order–disorder and magnetic transitions in Co 2YGa (Y=Ti, V, Cr, Mn, Fe) alloys were investigated by electron probe microanalysis (EPMA), differential scanning calorimetry (DSC) and vibrating sample magnetometry (VSM). It was confirmed that the B2/L2 1 order–disorder transition temperature for the Co 2YGa (Y=Ti, V, Cr) alloys monotonically decreases with increasing electron concentration of the Y site, whereas that of the Co 2YGa (Y=Mn, Fe) alloys is almost constant at 1100 ± 100 K. On the other hand, the Curie temperature T C of all the alloys rises almost monotonically with increasing electron concentration of the Y site.
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