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Morphology control of Fe films using ordered termination on SrTiO3 surfaces

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3 Author(s)
Chien, TeYu ; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA ; Freeland, John W. ; Guisinger, Nathan P.

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Long-range nanometer-scale stripe patterns of alternating termination on fractured Nb-doped SrTiO3 surfaces were used as templates to control the Fe film morphology. The as deposited Fe film consisted of a uniform layer of small Fe clusters (∼4 nm) randomly distributed on the surface. After annealing, two distinct morphologies were formed and were directly correlated to the underlying SrO and TiO2 terminated stripes. This behavior is consistent with a higher interfacial energy of the Fe/SrO interface than that of the Fe/TiO2 interface.

Published in:

Applied Physics Letters  (Volume:100 ,  Issue: 3 )