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Materials 2016, 9(10), 805; doi:10.3390/ma9100805

Optical and Piezoelectric Study of KNN Solid Solutions Co-Doped with La-Mn and Eu-Fe

1
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria, A.P. 70-360, México D.F. 04510, Mexico
2
Departamento de Ingeniería de Procesos e Hidráulica, Universidad Autónoma Metropolitana-Iztapalapa, A.P. 55-534, México D.F. 09340, Mexico
3
Unidad Morelia del Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro No. 8701, Col. Ex Hacienda de San José de la Huerta, Morelia C.P. 58190, Mexico
4
Instituto de Física, Universidad Nacional Autónoma de México, A.P. 20-364, México D.F. 04510, Mexico
5
Instituto de Ciencia de Materiales de Madrid (ICMM), CSIC. c/ Sor Juana Inés de la Cruz, 3. Cantoblanco, Madrid 28049, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Beatriz Noheda
Received: 15 July 2016 / Revised: 10 August 2016 / Accepted: 22 September 2016 / Published: 28 September 2016
(This article belongs to the Section Energy Materials)
View Full-Text   |   Download PDF [10401 KB, uploaded 28 September 2016]   |  

Abstract

The solid-state method was used to synthesize single phase potassium-sodium niobate (KNN) co-doped with the La3+–Mn4+ and Eu3+–Fe3+ ion pairs. Structural determination of all studied solid solutions was accomplished by XRD and Rietveld refinement method. Electron paramagnetic resonance (EPR) studies were performed to determine the oxidation state of paramagnetic centers. Optical spectroscopy measurements, excitation, emission and decay lifetime were carried out for each solid solution. The present study reveals that doping KNN with La3+–Mn4+ and Eu3+–Fe3+ at concentrations of 0.5 mol % and 1 mol %, respectively, improves the ferroelectric and piezoelectric behavior and induce the generation of optical properties in the material for potential applications. View Full-Text
Keywords: perovskite; alkaline niobates; co-doping; lead-free ceramics; Rietveld method; EPR; optical activity; dielectric permittivity; ferroelectricity; piezoelectricity perovskite; alkaline niobates; co-doping; lead-free ceramics; Rietveld method; EPR; optical activity; dielectric permittivity; ferroelectricity; piezoelectricity
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MDPI and ACS Style

Peña-Jiménez, J.-A.; González, F.; López-Juárez, R.; Hernández-Alcántara, J.-M.; Camarillo, E.; Murrieta-Sánchez, H.; Pardo, L.; Villafuerte-Castrejón, M.-E. Optical and Piezoelectric Study of KNN Solid Solutions Co-Doped with La-Mn and Eu-Fe. Materials 2016, 9, 805.

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