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Iowa State University

Series

Metallurgy

1998

Articles 1 - 1 of 1

Full-Text Articles in Physics

Clustered, Terraced And Mixed Surface Phases Of The Al70pd21mn9 Quasicrystal, J. Ledieu, A. W. Munz, T. M. Parker, R. Mcgrath, R. D. Diehl, Dwight W. Delaney, Thomas A. Lograsso Jan 1998

Clustered, Terraced And Mixed Surface Phases Of The Al70pd21mn9 Quasicrystal, J. Ledieu, A. W. Munz, T. M. Parker, R. Mcgrath, R. D. Diehl, Dwight W. Delaney, Thomas A. Lograsso

Ames Laboratory Conference Papers, Posters, and Presentations

The five-fold surface of the Al70 Pd21 Mn9 quasicrystal has been studied using STM, LEED and AES. STM images from surfaces which have been sputtered and annealed to 875 K reveal 20-30 Å protrusions that have been identified by others as Mackay-type clusters. Higher-resolution images reveal substructures in these clusters having dimensions 2-3 Å. Longer annealing times at 875 K produced large areas having flat terraces which were imaged with atomic resolution. The LEED pattern from this surface has sharp spots on a low background, and AES indicates that the surface is deficient in Mn relative to ...