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Title: Structural and electrocaloric properties of multiferroic-BiFeO3 doped 0.94Bi0.5Na0.5TiO3-0.06BaTiO3 solid solutions
Authors: Zheng, GP 
Uddin, S
Zheng, X
Yang, J
Keywords: Anelastic properties
Electrocaloric effects
Lead-free ferroelectrics
Oxygen vacancies
Issue Date: 2016
Publisher: Elsevier
Source: Journal of alloys and compounds, 2016, v. 663, p. 249-255 How to cite?
Journal: Journal of alloys and compounds 
Abstract: Single-phase (1-x)(0.94Bi0.5Na0.5TiO3-0.06BaTiO3)-xBiFeO3 (BNT-BT-xBF, x = 0.05, 0.1 and 0.15) solid solutions are fabricated using a modified citrate method. The structural, ferroelectric and electrocaloric properties are significantly affected by the multiferroic BiFeO3 doping, which is found to favor the antiferroelectric (AFE) state of the solid solutions. The dynamic mechanical analysis suggests that the BiFeO3 induced ordering of oxygen octahedrons plays a dominant role in the formation of AFE incommensurate phases and leads to the enhanced negative electrocaloric effect (ECE). A maximum ECE temperature change of 1.65 °C under an applied field of 70 kV/cm is observed. It is suggested that the magnetoelectric coupling is effective in enhancing the negative ECE in BNT-BT-xBF.
ISSN: 0925-8388
DOI: 10.1016/j.jallcom.2015.12.056
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