Title:
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Preisach modeling of temperature-dependent ferroelectric response of piezoceramics at sub-switching regime
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Author:
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Ochoa Guerrero, Diego A.; García García, José Eduardo
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Física; Universitat Politècnica de Catalunya. CEMAD - Caracterització Elèctrica de Materials i Dispositius |
Abstract:
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The Preisach model is a classical method for describing nonlinear behavior in hysteretic systems. According to this model, a hysteretic system contains a collection of simple bistable units which are characterized by an internal field and a coercive field. This set of
bistable units exhibits a statistical distribution that depends on these fields as parameters. Thus, nonlinear response depends on the specific distribution function associated with the material. This model is satisfactorily used in this work to describe the temperature-dependent ferroelectric response in PZT- and KNN-based piezoceramics. A distribution function expanded in Maclaurin series considering
only the first terms in the internal field and the coercive field is proposed. Changes in coefficient relations of a single distribution function allow us to explain the complex temperature dependence of hard piezoceramic behavior. A similar analysis based on the same form of the distribution function shows that the KNL–NTS properties soften
around its orthorhombic to tetragonal phase transition. |
Subject(s):
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-Àrees temàtiques de la UPC::Física -Piezoelectric ceramics -Dielectrics -Ferroelectric crystals -PZT -ceramics -dielectric properties -ferroelectrics -Preisach model -Ceràmica piezoelèctrica -Dielèctrics -Ferroelectricitat |
Rights:
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http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Submitted version Article |
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