Soft X-Ray Emission Spectra of Aluminium in β-Phase Cu–Ni–Al and Cu–Mn–Al Alloys

Electronic states associated with aluminium atoms in ternary Cu–Ni–Al and Cu–Mn–Al alloys with B2 and L2 1 order structures, respectively, were investigated by measuring Al K β emission spectra. The spectra generally consisted of three peaks which changed in strength and in energy (Cu–Mn–Al) systematically with compositions. The lower two peaks were assigned to bonding states of aluminium 3 p electrons hybridizing with the 3 d states of copper and ticket or manganese atoms. These assignments were consistent with a CPA model calculation on the K emission spectra of transition-transition and transition-simple metal alloys by Kudrnovský, Smrčka and Velický.