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Title: | Effect of Fe-doping on the structure and magnetoelectric properties of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O-3 synthesized by a chemical route |
Author: | Ramana, E. Venkata Figueiras, F. Mahajan, A. Tobaldi, David Maria Costa, Benilde F. O. Graca, M. P. F. Valente, M. A. |
Keywords: | DIELECTRIC-PROPERTIES TITANATE CERAMICS THIN-FILMS BATIO3 FERROMAGNETISM MAGNETISM SIZE NANOPARTICLES PRESSURE SPECTRA |
Issue Date: | 2016 |
Publisher: | ROYAL SOC CHEMISTRY |
Abstract: | B-site Fe-doped (Ba0.85Ca0.15)(Ti0.9Zr0.1)O-3 was synthesized by a facile chemical route to study the effect of doping on its physical properties. Detailed analysis of X-ray diffraction and Raman spectroscopy data revealed an increased lattice strain and thereby deviation from the morphotropic phase boundary with the progressive doping of Fe from 1 to 5 mol%. Such structural changes have resulted in the weakening of the energy band gap as well as deterioration of the ferroelectric polar nature which was evidenced by a shift of tetragonal to cubic transitions towards room temperature and hard doping effects in ferroelectric hysteresis. The doped samples exhibited room temperature ferromagnetism. Combined Mossbauer and X-ray photoelectron spectroscopic studies suggest that oxygen vacancies and defect complexes induced by Fe doping play a major role in magnetic properties. Local piezoresponse measurements illustrated imprint characteristics of ferroelectric domains in undoped and doped samples at the nanoscale. Room temperature magnetoelectric (ME) measurements revealed that 1 mol% Fe doped sample, having higher ferroelectric polarization and moderate magnetization, exhibits a strong ME response with a coefficient of 12.8 mV cm(-1) Oe(-1). The present study on Fe-doping effects on the structure and related ME properties of this important lead-free material is useful to tailor multiferroic applications in electronics. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/19551 |
DOI: | 10.1039/c5tc00914f |
ISSN: | 2050-7526 |
Publisher Version: | 10.1039/c5tc00914f |
Appears in Collections: | CICECO - Artigos |
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Effect of Fe-doping on the structure and magnetoelectric properties of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O-3 synthesized by a chemical route_10.1039c5tc00914f.pdf | 3.51 MB | Adobe PDF |
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