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Local switching properties of dense nanocrystalline BaTiO3 ceramics (Articolo in rivista)

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Local switching properties of dense nanocrystalline BaTiO3 ceramics (Articolo in rivista) (literal)

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Liliana Mitoseriu; Catalin Harnagea; Paolo Nanni; Andrea Testino; Maria Teresa Buscaglia; Vincenzo Buscaglia; Massimo Viviani; Zhe Zhao; Mats Nygren (2004)
Local switching properties of dense nanocrystalline BaTiO3 ceramics
in Applied physics letters (Online); AIP, American institute of physics, Melville, NY (Stati Uniti d'America)
(literal)

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Liliana Mitoseriu; Catalin Harnagea; Paolo Nanni; Andrea Testino; Maria Teresa Buscaglia; Vincenzo Buscaglia; Massimo Viviani; Zhe Zhao; Mats Nygren (literal)

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http://puma.isti.cnr.it/linkres.php?resource=cnr.ieni/cnr.ieni.ge/2004-A0-016 (literal)

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In: Applied Physics Letters, vol. 84 (13) pp. 2418-2420. American Institute of Physics, 2004. (literal)

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Department of Chemical and Process Engineering, University of Genoa, P.le Kennedy 1, I-16129, Italy and Department of Electricity and Electronics, Al.I. Cuza University, Bv. Carol I, 11, Iasi 700506, Romania; INRS-EMT, University of Quebec, 1650 Lionel-Boulet, Varennes, Quebec J3X 1S2, Canada; Institute for Energetics and Interphases-CNR, Via De Marini 6, I-16149 Genoa, Italy; Department of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, S-10691 Stockholm, Sweden (literal)

Titolo

Abstract

The switching properties of dense BaTiO3 ceramics with 50 nm average grain size were investigated at local scale by piezoresponse force microscopy. Large areas with low piezoelectrical activity beside islands with strong piezoresponse were found. The application of electric fields induces stable domain structures and changes in the polarization state far away from the probing area, probably via trans-granular dipole interactions. Piezoelectric hysteresis loops were recorded on various positions, even in regions with initial zero piezoresponse, which possibly showed a superparaelectric behavior. The results are incontestable proof that 50 nm BaTiO3 ceramics retain ferroelectricity at a local scale. (literal)

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