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Ferroelectrics Volume 481, 2015 - Issue 1
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Articles

Temperature and Stress Induced Electromechanical Coupling in Relaxor Ferroelectric Compounds

Syed MahboobMaterials Research Laboratory, Department of Physics, Osmania University, Hyderabad-500 007, Telengana state, IndiaCorrespondence[email protected] [email protected]
,
G. PrasadMaterials Research Laboratory, Department of Physics, Osmania University, Hyderabad-500 007, Telengana state, India
&
G. S. KumarMaterials Research Laboratory, Department of Physics, Osmania University, Hyderabad-500 007, Telengana state, IndiaCorrespondence[email protected] [email protected]
Pages 89-97 | Accepted 02 Nov 2015, Published online: 01 Sep 2015
 
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Abstract

Temperature and stress induced electromechanical coupling studies were carried out for relaxor ferroelectric ceramics Ba(NdxTi(1-2x)Nbx)O3, Ba(NdyTi(1-2y)Nby)O3 and [Ba(Nd0.1Ti0.8Nb0.1)O3](1-z)[Na0.5Bi0.5TiO3]z. The thickness mode of electromechanical coupling and effective electromechanical coupling factors obtained from capacitance measurements were in the range 0.40–0.78 depending up on the compound, its composition and temperature. From modulus measurements the thickness and effective mode of electromechanical coupling factors obtained are in the range 0.9960–0.9998 depending up on the composition z.

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Funding

The authors would like to thank DRDO, Delhi, India for financial support in carrying the present research work during my tenure as SRF.

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