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Effect of off-center ion substitution in morphotropic lead zirconate titanate
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dc.contributor.author | Bhattarai, Mohan K. | |
dc.contributor.author | Pavunny, Shojan P. | |
dc.contributor.author | Instan, Alvaro A. | |
dc.contributor.author | Scott, James Floyd | |
dc.contributor.author | Katiyar, Ram S. | |
dc.date.accessioned | 2017-05-19T10:30:09Z | |
dc.date.available | 2017-05-19T10:30:09Z | |
dc.date.issued | 2017-05-21 | |
dc.identifier | 249921104 | |
dc.identifier | f51467a8-99d5-4941-a35f-4da75b624e72 | |
dc.identifier | 85019630713 | |
dc.identifier | 000401771800009 | |
dc.identifier.citation | Bhattarai , M K , Pavunny , S P , Instan , A A , Scott , J F & Katiyar , R S 2017 , ' Effect of off-center ion substitution in morphotropic lead zirconate titanate ' , Journal of Applied Physics , vol. 121 , no. 19 , 194102 . https://doi.org/10.1063/1.4983526 | en |
dc.identifier.issn | 0021-8979 | |
dc.identifier.uri | https://hdl.handle.net/10023/10799 | |
dc.description | This research was supported by the DOD Grant No. FA9550–16-1–0295. S.P.P. gratefully acknowledges the financial assistance from IFN-NSF under the Grant No. EPS-1002410. | en |
dc.description.abstract | A detailed study of the effect of off-center donor ion (Sc3+) substitution on structural, microstructural, optical, dielectric, electrical and ferroelectric properties of morphotropic lead zirconate titanate electroceramics with the stoichiometric formula Pb0.85Sc0.10Zr0.53Ti0.47O3 (PSZT), synthesized using a high-energy solid-state reaction technique, was carried out. Powder x-ray diffractometry was used to identify the stabilized tetragonal phase (space group P4mm) with considerably reduced tetragonal strain, c/a = 1.005. An analysis of the thermal dependence of the Raman results indicated a smooth order-disorder displacive (ferroelectric-paraelectric) phase transition as revealed by the observed disappearance of the soft modes A1 (1TO) and A1 (2TO) above 460 K. The dielectric response of Pt/PSZT/Pt metal-ferroelectric-metal (MFM) capacitors was probed over a wide range of thermal excursions (85-600 K) and ac signal frequencies (102-106 Hz). Thermally activated dynamic and static conduction processes indicate hopping conduction mechanism (Eact ≤ 0.015 eV) and the formation of small polarons caused by the electron and/or hole-lattice (phonon) interaction (Eact ≥ 0.1 eV) at low (100−300 K) and high temperatures (300−600 K), respectively. The reduction in remnant polarization obtained is in good agreement with the largely reduced tetragonal strain observed in this sample, ( Pr ∝√(c/a-1) ). DC current conduction is dominated by Poole-Frenkel mechanism that assumes a Coulombic attraction between de-trapped electrons and positively charged stationary defects in the polycrystalline matrix. | |
dc.format.extent | 388392 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Applied Physics | en |
dc.subject | QC Physics | en |
dc.subject | T Technology | en |
dc.subject | NDAS | en |
dc.subject.lcc | QC | en |
dc.subject.lcc | T | en |
dc.title | Effect of off-center ion substitution in morphotropic lead zirconate titanate | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. Condensed Matter Physics | en |
dc.identifier.doi | https://doi.org/10.1063/1.4983526 | |
dc.description.status | Peer reviewed | en |
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