Search results for "BiFeO_3"

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Investigations of Low Temperature Phase Transitions in BiFeO3Ceramic by Infrared Spectroscopy

2011

In this paper, results of new infrared FIR-MIR measurements (wavenumber range of 4000–100 cm−1) in the range of the temperature 300 ÷ 8 K of the BiFeO3 ceramic are presented. Below 200 K only one symmetric band at ca. 800 cm−1 is visible. The full width at half maximum of this band decreases exponentially on cooling. The shape of the band at ca. 545 cm−1connected with A1 (TO) mode also changes between 60–40 K, this is in the vicinity of the phase transition at 50 K. Initially a broad band reveals its components as shoulder bands. Theirs FWHM decrease with cooling.

Phase transitionMaterials sciencemultiferroicsInfraredbusiness.industryInfrared spectroscopyH bandbismuth ferriteCondensed Matter PhysicsMolecular physicsElectronic Optical and Magnetic MaterialsFull width at half maximumchemistry.chemical_compoundOpticschemistryvisual_artBiFeO_3IRvisual_art.visual_art_mediumWavenumberCeramicbusinessBismuth ferriteFerroelectrics
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