Phase boundary at x=0.03 and its anomalous influence on the structure and properties in the lead-free piezoelectric (1−x)Na1/2Bi1/2TiO3−(x)BaTiO3

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dc.contributor.authorRao, BNen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorRanjan, Ren_AU
dc.date.accessioned2021-01-19T02:49:08Zen_AU
dc.date.available2021-01-19T02:49:08Zen_AU
dc.date.issued2015-12-14en_AU
dc.date.statistics2021-01-11en_AU
dc.description.abstractThe complexity associated with local structures continues to pose challenges with regard to the understanding of the structure-property relationship in Na1/2Bi1/2TiO3-based lead-free piezoceramics. (1−x)Na1/2Bi1/2TiO3−(x)BaTiO3 is an extensively studied system because of its interesting piezoelectric properties. Recently, a room temperature phase boundary was reported at x=0.03 in this system [Ma et al., Adv. Funct. Mater. 23, 5261 (2013)]. In the present work we have examined this subtle phase boundary using x-ray diffraction, neutron diffraction, dielectric measurements as a function of composition (x<0.06), temperature, and electric field. Our results show that this boundary separates an R3c+Cc-like structural state for x<0.03 from an R3c+ cubiclike structural state for 0.03≤x≤0.05 in the unpoled specimens. This phase boundary is characterized by an anomalous reduction in the depolarization temperature, and a suppression of the tetragonal distortion of the high temperature P4bm phase. Our results also provide the clue to understand the pathway leading to the cubiclike structure of the critical composition x=0.06, known for its highest piezoelectric response. ©2015 American Physical Societyen_AU
dc.identifier.articlenumber214107en_AU
dc.identifier.citationRao, B. N., Avdeev, M., Kennedy, B., & Ranjan, R. (2015). Phase boundary at x=0.03 and its anomalous influence on the structure and properties in the lead-free piezoelectric (1−x)Na1/2Bi1/2TiO3−(x)BaTiO3. Physical Review B, 92(21), 214107. doi:10.1103/PhysRevB.92.214107en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue21en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttps://doi.org/10.1103/PhysRevB.92.214107en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10258en_AU
dc.identifier.volume92en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectCeramicsen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectDielectric materialsen_AU
dc.subjectPhase transformationsen_AU
dc.subjectElectric fieldsen_AU
dc.titlePhase boundary at x=0.03 and its anomalous influence on the structure and properties in the lead-free piezoelectric (1−x)Na1/2Bi1/2TiO3−(x)BaTiO3en_AU
dc.typeJournal Articleen_AU
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