Modified structure and optical properties of multiferroic Pb(Zr0.53Ti0.47)x(Fe0.5Nb0.5)(1−x)O3 ceramics. Issue 1 (January 2016)

• Record Type: Journal Article
• Authors: Yu, Lu; Deng, Hongmei; Zhou, Wenliang; Cao, Huiyi; Zheng, Tuo; Yang, Pingxiong; Chu, Junhao
• Is Part Of: Ceramics international. Volume 42:Issue 1:Part A(2016)
• Page Start: 917
• Page End: 922
• Publication Date: 2016-01
• Subjects: Pb(Zr0.53Ti0.47)x(Fe0.5Nb0.5)(1−x)O3 -- Multiferroic ceramics -- Phase transition -- Optical property; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.09.019
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: The Pb(Zr0.53 Ti0.47 ) x (Fe0.5 Nb0.5 )(1− x ) O3 ( x PZTFN) multiferroic ceramics synthesized by a solid state reaction method have been investigated by means of structural characterizations and optical measurement. All the samples show polycrystalline perovskite structures with dense microstructures, but exhibit a gradual transition behavior from cubic to tetragonal structure with increasing x . The x PZTFN (0≤ x ≤0.2) ceramics have an average crystal structure described as the centrosymmetric cubic perovskite, whereas x ≥0.4 ceramics are consistent with a non-centrosymmetric tetragonal structure. Coexistence of both cubic and tetragonal symmetries is observed for x =0.3. Raman spectroscopy analysis corroborates the change in average structure with the x but also show the local crystal symmetry for 0≤ x ≤0.2 ceramics to deviate from the idealized cubic perovskite. Optical absorption spectra indicate that Pb(Zr0.53 Ti0.47 )O3 (PZT) doping has an effect on the energy band structure. The band gap ( E g ) of x PZTFN (0≤ x ≤0.7) ceramics is in the range of 2.08–2.33 eV, much smaller than the 3.21 eV E g of the PZT material. This result shows that the modification of optical property can be achieved by manipulating the composition in x PZTFN materials.