Effect of Fe-doping on the structure and magnetoelectric properties of (Ba0.85Ca0.15)(Ti0.9Zr0.1)O-3 synthesized by a chemical route
authors Ramana, EV; Figueiras, F; Mahajan, A; Tobaldi, DM; Costa, BFO; Graca, MPF; Valente, MA
nationality International
journal JOURNAL OF MATERIALS CHEMISTRY C
keywords DIELECTRIC-PROPERTIES; TITANATE CERAMICS; THIN-FILMS; BATIO3; FERROMAGNETISM; MAGNETISM; SIZE; NANOPARTICLES; PRESSURE; SPECTRA
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.
publisher ROYAL SOC CHEMISTRY
issn 2050-7526
year published 2016
volume 4
issue 5
beginning page 1066
ending page 1079
digital object identifier (doi) 10.1039/c5tc00914f
web of science category Materials Science, Multidisciplinary; Physics, Applied
subject category Materials Science; Physics
unique article identifier WOS:000369603400022
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