Determination of Auger sensitivity factors for Al-rich quasicrystals

Jenks, Cynthia J.; Bloomer, T. E.; Kramer, M. J.; Lograsso, Thomas A.; Delaney, D.W.; Ross, A. R.; Sordelet, D.J.; Besser, M.F.; Thiel, Patricia A.

doi:10.1016/s0169-4332(01)00326-9

Cited by 13 publications

(1 citation statement)

References 37 publications

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“…10 At higher temperatures, the surface usually changes to a flat quasicrystalline phase. 24 An intermediate phase that is both quasicrystalline and rough may form around 700 K. 8 Flat crystalline phases can also form above 700 K. [25][26][27][28][29] The factors that select between crystalline and quasicrystalline surface phases above 700 K are poorly understood.…”

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confidence: 99%

Terrace selection during equilibration at an icosahedral quasicrystal surface

et al. 2005

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We investigate the equilibration of a fivefold surface of the icosahedral Al-Pd-Mn quasicrystal at 900-915 and 925-950 K, using scanning tunneling microscopy. After annealing at the lower temperatures, there is a high density of shallow voids on some terraces but not on others; at 925-950 K, the void-rich terraces are much rarer. The terminations that are consumed by voids exhibit a distinctive local atomic configuration, called a "ring" by previous authors. Apparently, through growth and coalescence of the voids, a different termination becomes exposed on the host terraces, which also leads to a change in step heights at the edges of the terraces. We suggest that the shallow steps associated with the voids, and the ring configuration, signal a surface that is in an intermediate stage of structural equilibration. We investigate the equilibration of a fivefold surface of the icosahedral Al-Pd-Mn quasicrystal at 900-915 and 925-950 K, using scanning tunneling microscopy. After annealing at the lower temperatures, there is a high density of shallow voids on some terraces but not on others; at 925-950 K, the void-rich terraces are much rarer. The terminations that are consumed by voids exhibit a distinctive local atomic configuration, called a "ring" by previous authors. Apparently, through growth and coalescence of the voids, a different termination becomes exposed on the host terraces, which also leads to a change in step heights at the edges of the terraces. We suggest that the shallow steps associated with the voids, and the ring configuration, signal a surface that is in an intermediate stage of structural equilibration.

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