Investigation of ferroelectric materials by the thermal noise method: advantages and limitations

0470574 - FZÚ 2017 RIV GB eng J - Journal Article
Bednyakov, Petr - Shnaidshtein, I. V. - Strukov, B. A.
Investigation of ferroelectric materials by the thermal noise method: advantages and limitations.
Ferroelectrics. Roč. 500, č. 1 (2016), 203-217. ISSN 0015-0193. E-ISSN 1563-5112
R&D Projects: GA ČR GA13-15110S
Institutional support: RVO:68378271
Keywords : thermal noise * ferroelectricity * thin films * dielectric permittivity * equivalent circuit
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 0.551, year: 2016

An overview of the dielectric properties of ferroelectrics by means of thermal noise method from 60s to our days is presented. Different realizations of the thermal noise method are discussed and the advantages and disadvantages are compared for bulk crystals and for thin films. A short overview of the application of the thermal noise method for measurements of dielectric properties of different objects (barium titanate and triglycine sulphate crystals and barium titanate thin films) is presented. The original method for thermal noise voltage characterization, based on digital data processing is demonstrated. The piezoactivity data for barium titanate crystals below phase transition temperature are obtained by thermal noise method. Barkhausen thermal noise data for barium titanate and triglycine sulphate crystals are analyzed below and above the phase transition temperature.
Permanent Link: http://hdl.handle.net/11104/0268174