Local manifestations of a static magnetoelectric effect in nanostructured BaTiO3-BaFe12O9 composite multiferroics
authors Trivedi, H; Shvartsman, VV; Lupascu, DC; Medeiros, MSA; Pullar, RC; Kholkin, AL; Zelenovskiy, P; Sosnovskikh, A; Shur, VY
nationality International
journal NANOSCALE
keywords PIEZORESPONSE FORCE MICROSCOPY; HIGH-PRESSURE RAMAN; FERROELECTRIC MATERIALS; POLARIZATION; BATIO3; FIELD; NANOCOMPOSITE
abstract A study on magnetoelectric phenomena in the barium titanate-barium hexaferrite (BaTiO3-BaFe12O19) composite system, using high resolution techniques including switching spectroscopy piezoresponse force microscopy (SSPFM) and spatially resolved confocal Raman microscopy (CRM), is presented. It is found that both the local piezoelectric coefficient and polarization switching parameters change on the application of an external magnetic field. The latter effect is rationalized by the influence of magnetostrictive stress on the domain dynamics. Processing of the Raman spectral data using principal component analysis (PCA) and self-modelling curve resolution (SMCR) allowed us to achieve high resolution phase distribution maps along with separation of average and localized spectral components. A significant effect of the magnetic field on the Raman spectra of the BaTiO3 phase has been revealed. The observed changes are comparable with the classical pressure dependent studies on BaTiO3, confirming the strain mediated character of the magnetoelectric coupling in the studied composites.
publisher ROYAL SOC CHEMISTRY
issn 2040-3364
year published 2015
volume 7
issue 10
beginning page 4489
ending page 4496
digital object identifier (doi) 10.1039/c4nr05657d
web of science category Chemistry, Multidisciplinary; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
subject category Chemistry; Science & Technology - Other Topics; Materials Science; Physics
unique article identifier WOS:000350669900025
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journal impact factor 7.233
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