Magnetodielectric coupling of infrared phonons in single crystal Cu2OSeO3

Journal Article · Fri Jan 01 04:00:00 EST 2010 · Physical Review B

OSTI ID:991185

Miller, K. H. ^[1]; Xu, Xiaoshan ^[2]; Berger, H. ^[3]; Knowles, E. S. ^[1]; Arenas, D. J. ^[1]; Meisel, Mark W. ^[1]; Tanner, D. B. ^[1]

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1. University of Florida, Gainesville
2. ORNL
3. Ecole Polytechnique Federale de Lausanne, Switzerland

Reflection and transmission as a function of temperature 5 300 K have been measured on a single crystal of the magnetoelectric ferrimagnetic compound Cu2OSeO3 utilizing light spanning the far infrared to the visible portions of the electromagnetic spectrum. The complex dielectric function and optical properties were obtained via Kramers-Kronig analysis and by fits to a Drude-Lortentz model. The fits of the infrared phonons show a magnetodielectric effect near the transition temperature Tc60 K. Assignments to strong far-infrared phonon modes have been made, especially those exhibiting anomalous behavior around the transition temperature.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: ORNL LDRD Director's R&D
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 991185
• Journal Information: Physical Review B, Journal Name: Physical Review B Journal Issue: 14 Vol. 82; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
DIELECTRIC MATERIALS
MONOCRYSTALS
OPTICAL PROPERTIES
PHONONS
REFLECTION
TRANSITION TEMPERATURE