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Ferroelectric properties in thin film barium titanate grown using pulsed laser deposition

Lookup NU author(s): Dan Appleby, Dr Nilhil Ponon, Dr Kelvin Kwa, Srinivas Ganti, Professor Anthony O'Neill

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Abstract

The characteristics of polycrystalline BaTiO3 metal-insulator-metal capacitors, fabricated using pulsedlaser deposition, are investigated from room temperature to 420 K. The capacitance–voltagecharacteristics show ferroelectric behaviour at room temperature, with a phase transition toparaelectric at higher temperature. However, the permittivity response shows paraelectric behaviouracross all measured temperatures. So BaTiO3 exists here in a mixture of cubic and tetragonal phases.The BaTiO3 films have a columnar structure, with grain size increasing with film thickness due totheir increasing height but not diameter. This correlates with an increase in remnant polarization. Theresults support a size driven phase transition in thin films of polycrystalline BaTiO3.

Publication metadata

Author(s): Appleby DJR, Ponon NK, Kwa KSK, Ganti S, Hannemann U, Petrov PK, Alford NM, O'Neill AG

Publication type: Article

Publication status: Published

Journal: Journal of Applied Physics

Year: 2014

Volume: 116

Print publication date: 28/09/2014

Online publication date: 24/09/2014

Acceptance date: 08/08/2014

Date deposited: 12/12/2014

ISSN (print): 0021-8979

ISSN (electronic): 1089-7550

Publisher: AIP Publishing

URL: http://dx.doi.org/10.1063/1.4895050

DOI: 10.1063/1.4895050

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