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Growth of Dy on W(100) at room temperature produced a rough surface covered by rhombic-shaped islands. The islands were strained perpendicular to the direction of substrate terraces. Annealing to 820 K produced strained, but well-ordered islands of Dy with a c(8x2) structure, with the principal direction of strain the same as for the as-grown islands. Further investigation showed that Dy islands do...
A new c(2x2) structure was produced by annealing a Dy film on W(100) to high temperature. This structure showed high-temperature stability up to 1500 K suggesting hollow sites for Dy atoms in this structure. STM studies of the c(2x2) structure at submonolayer coverage showed that domains of c(2x2) were formed near to the step edges.
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