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Magnetoelastic coupling in DyMn2O5 via infrared spectroscopy
- Authors
- Cao, J.; Vergara, L.I.; Musfeldt, J.L.; Litvinchuk, A.P.; Wang, Y.J.; Park, S.; Cheong, S.-W.
- Issue Date
- Aug-2008
- Publisher
- AMER PHYSICAL SOC
- Citation
- PHYSICAL REVIEW B, v.78, no.6
- Journal Title
- PHYSICAL REVIEW B
- Volume
- 78
- Number
- 6
- ISSN
- 2469-9950
2469-9969
- Abstract
- We investigated the infrared-active phonons in DyMn2O5 as a function of temperature and magnetic field in order to elucidate the magnetic ordering-induced lattice distortions. Spin-lattice coupling in this geometrically frustrated multiferroic is evidenced by small frequency shifts of several phonon modes at various magnetic ordering temperatures, vibrational frequency shifts between 60 and 65 K from which we extract large coupling constants, and magnetic-field dependence of numerous phonons. We analyze these results in terms of local lattice distortions and discuss the consequences for the ferroelectric polarization and magnetodielectric effect.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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