Interface-mediated ferroelectric patterning and Mn valency in nano-structured PbTiO3/La0.7Sr0.3MnO3

Ingo P. Krug, Hatice Doganay, Florian Nickel, Daniel M. Gottlob, Claus M. Schneider, Alessio Morelli, Daniele Preziosi, Ionela Lindfors-Vrejoiu, Robert Laskowski, Nick Barrett

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We employed a multitechnique approach using piezo-force response microscopy and photoemission microscopy to investigate a self-organizing polarization domain pattern in PbTiO3/La0.7Sr0.3MnO3 (PTO/LSMO) nanostructures. The polarization is correlated with the nanostructure morphology as well as with the thickness and Mn valence of the LSMO template layer. On the LSMO dots, the PTO is upwards polarized, whereas outside the nanodots, the polarization appears both strain and interface roughness dependent. The results suggest that the electronic structure and strain of the PTO/LSMO interface contribute to determining the internal bias of the ferroelectric layer.
Original languageEnglish
Article number095304
JournalJournal of Applied Physics
Issue number9
Early online date02 Sep 2016
Publication statusPublished - 2016


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