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Temperature-dependence of electromechanical coupling and strain in barium titanate hafnate transducer

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Abstract

The electromechanical coupling factor and ferroelectric hysteresis loops were investigated at different temperatures for BaTi0.85Hf0.15O3 transducer. Maximum polarization and strain were obtained near the transition of the crystal structure. This correlated with increases in the ease and extent of ferroelectric domain boundary motion. The change in the crystal structure varied the unit cell volume, leading to higher strain.

Zusammenfassung

Der elektromechanische Kopplungsfaktor und die ferroelektrische Hysteresisschleife wurde für BaTi0.85Hf0.15O3-Transducer bei verschiedenen Temperaturen untersucht. Polarisation und Deformation nehmen in der Nähe des Umwandlungspunktes der Kristallstruktur maximale Werte an. Dies korreliert mit Leichtigkeit und Außmaß der Grenzbewegung im ferromagnetischen Bereich. Die mit der Umwandlung der Kristallstruktur zusammenhängende Veränderung des Elementarzellenvolumens führt zu größerer Verformung.

Резюме

Для преобразователе й BaTi0.85Hf0.15O3 при различных температу рах были измерены коэффициент электро механической связи и сегнетоэлектрическ ие гистерезисные пет ли. Максимум поляризаци и и деформации были на йдены около структурного фазово го перехода. Установленный факт к оррелируется с увели чением легкости и степени см ещения границ сегнетоэлектрическ их доменов. Изменение кристаллической стр уктуры сопровождает ся изменением изменением объема элементарной кристаллической яче йки, что вызывает большуэ деф ормацию.

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Authors and Affiliations

  1. Phys. Department Faculty of Science, Tanta University, Egypt

    A. Tawfik & M. I. Abd El Ati

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  1. A. Tawfik
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  2. M. I. Abd El Ati
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Tawfik, A., El Ati, M.I.A. Temperature-dependence of electromechanical coupling and strain in barium titanate hafnate transducer. Journal of Thermal Analysis 32, 729–735 (1987). https://doi.org/10.1007/BF01913758

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  • DOI: https://doi.org/10.1007/BF01913758

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