Spin-phonon interactions of multiferroic Bi{sub 4}Ti{sub 3}O{sub 12}-BiFeO{sub 3} ceramics: Low-temperature Raman scattering and infrared reflectance spectra investigations

Journal Article · Mon Apr 14 04:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4870054· OSTI ID:22273648

Jiang, P. P.; Zhang, X. L.; Chang, P.; Bai, W.; Li, Y. W.; Chu, J. H. ^[1]

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1. Department of Electronic Engineering, Key Laboratory of Polar Materials and Devices, Ministry of Education, East China Normal University, Shanghai 200241 (China)

Optical phonons of multiferroic Bi{sub 4}Ti{sub 3}O{sub 12}-BiFeO{sub 3} ceramic have been investigated by low temperature Raman scattering and infrared reflectance spectra. Anomalies at about 85 K can be observed from the temperature dependence of the Raman and infrared modes, which arise from spin-phonon interaction during antiferromagnetic to paramagnetic phase transition. It was found that the change of exchange interaction in magnetic phase transition can be induced by Fe-O-Fe octahedral tilting driven from the A-site atoms. Moreover, ferroelectricity-related displacement of Bismuth atoms suggests the coupling of magnetic and ferroelectric orders.

• OSTI ID: 22273648
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 14 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
BISMUTH COMPOUNDS
CERAMICS
COUPLING
EXCHANGE INTERACTIONS
FERRITES
FERROELECTRIC MATERIALS
INFRARED SPECTRA
PARAMAGNETISM
PHASE TRANSFORMATIONS
PHONONS
RAMAN EFFECT
RAMAN SPECTRA
SPIN
TEMPERATURE DEPENDENCE
TITANATES