Observation of anomalous phonons in orthorhombic rare-earth manganites

P. Gao, H. Y. Chen, T. A. Tyson, Z. X. Liu, J. M. Bai, L. P. Wang, Y. J. Choi, S. W. Cheong

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Abstract

We observe the appearance of a phonon near the lock-in temperature in orthorhombic REMnO3 (RE denotes rare earth) (RE: Lu and Ho) and anomalous phonon hardening in orthorhombic LuMnO3. The anomalous phonon occurs at the onset of spontaneous polarization. No such changes were found in incommensurate orthorhombic DyMnO3. These observations directly reveal different electric polarization mechanisms in the E-type and incommensurate-type orthorhombic REMnO3.

Original languageEnglish
Article number262905
JournalApplied Physics Letters
Volume97
Issue number26
DOIs
Publication statusPublished - 2010 Dec 27

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Gao, P., Chen, H. Y., Tyson, T. A., Liu, Z. X., Bai, J. M., Wang, L. P., Choi, Y. J., & Cheong, S. W. (2010). Observation of anomalous phonons in orthorhombic rare-earth manganites. Applied Physics Letters, 97(26), [262905]. https://doi.org/10.1063/1.3533022