Growth of PbTiO3 and BiFeO3 thin films on flat and three-dimensional SrRuO3 surface morphologies

Albers, H.J. and Bone, S.W. de (2012) Growth of PbTiO3 and BiFeO3 thin films on flat and three-dimensional SrRuO3 surface morphologies.

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Abstract:When thin films of PbTiO3 or BiFeO3 are grown on a DyScO3 substrate with three-dimensional SrRuO3 structures, two different surface morphologies are observed. In this research, the hypothesis that this different topography is caused by a difference in surface diffusion of the two materials on SrRuO3 and on themselves is not confirmed nor contradicted. The eventual conclusion is that the results indicate that the diffusion coefficient PbTiO3 on SrRuO3 is lower than the diffusion coefficient of BiFeO3 on SrRuO3, but that this cannot be seen as actual proof of the hypothesis. This conclusion was formed after an AFM step-by-step analysis of the growth of the two materials on SrRuO3, and a diffusivity analysis of the two materials on SrRuO3 surfaces. A kinetic Monte Carlo model was executed to gain more insight in the growth of the materials on 3D SrRuO3 structures. The results of this simulation show that other factors not included in this research as the bonding of PbTiO3 and BiFeO3 with the DyScO3 substrate could also influence this difference in growth behaviour for the two combinations.
Item Type:Essay (Bachelor)
Faculty:TNW: Science and Technology
Subject:33 physics
Programme:Applied Physics BSc (56962)
Link to this item:http://purl.utwente.nl/essays/62525
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