Photoelectron spectra of an Al70Pd21Mn9 quasicrystal and the cubic alloy Al60Pd25Mn15

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1996-09-01
Authors
Lynch, David
Jenks, Cynthia
Chang, S.-L.
Anderegg, James
Thiel, Patricia
Thiel, Patricia
Lynch, David
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Abstract

Photoelectron spectra of a fivefold quasicrystalline alloy Al70Pd21Mn9 and a related cubic alloy Al60Pd25Mn15 reveal two noteworthy features. The first is that the Pd 3d lines fall at binding energies which are 2.2 eV higher than in pure Pd. A similar shift is observed for Pd in other alloys. The second noteworthy feature is that the Mn 2p32 line is very sharp in the quasicrystal. Fitting the experimental peaks with a Doniach-Sunjic line shpae suggests that the position and density of Mn states near EF is very sensitive to the structural and/or chemical environment of Mn in the alloys, and that this accounts for the shape of the 2p32 Mn line. The sharpness of the Mn line may be a fingerprint of the quasicrystalline phase within the AlPdMn family.

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This article is from Physical Review B 54 (1996): 6301, doi:10.1103/PhysRevB.54.6301. Posted with permission.

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