6533b825fe1ef96bd1283444

RESEARCH PRODUCT

Investigations of Low Temperature Phase Transitions in BiFeO3Ceramic by Infrared Spectroscopy

Maija AntonovaAndrzej BudziakAnna KalvaneŁUkasz HetmańczykJoanna HetmańczykD. M. NaleczBarbara Garbarz-glosRenata Bujakiewicz-korońskaJ. Koroński

subject

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 ferrite

description

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.

yearjournalcountryeditionlanguage
2011-01-01Ferroelectrics
https://doi.org/10.1080/00150193.2011.578495