Surface structures of approximant phases in the Al-Pd-Mn system

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2002-01-01
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Lograsso, Thomas
Anderegg, James
Dong, C.
Kramer, Matthew
Canfield, Paul
Thiel, Patricia
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Lograsso, Thomas
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Canfield, Paul
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Abstract

We present a study of the surface of the ξ′-Al-Pd-Mn approximant phase based upon scanning tunneling microscopy and low-energy electron diffraction. Several structures are observed on two different samples grown either by the Bridgman technique or by a self-flux method, and which contain various degrees of disorder. We also describe some other complex crystalline phases that are sometimes observed on the fivefold surface of Al-Pd-Mn quasicrystalline samples after the sputter-annealing cleaning process under ultrahigh vacuum conditions. This includes the T approximant phase resulting from surface decomposition after a high-temperature annealing.

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This article is from Physical Review B 66, no. 16 (2002): 165423, doi:10.1103/PhysRevB.66.165423.

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Tue Jan 01 00:00:00 UTC 2002
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