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

Research output: Contribution to journalArticle

3 Citations (Scopus)

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

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phonons
rare earth elements
polarization
hardening
temperature

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Gao, P., Chen, H. Y., Tyson, T. A., Liu, Z. X., Bai, J. M., Wang, L. P., ... 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
Gao, P. ; Chen, H. Y. ; Tyson, T. A. ; Liu, Z. X. ; Bai, J. M. ; Wang, L. P. ; Choi, Y. J. ; Cheong, S. W. / Observation of anomalous phonons in orthorhombic rare-earth manganites. In: Applied Physics Letters. 2010 ; Vol. 97, No. 26.
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Gao, P, Chen, HY, Tyson, TA, Liu, ZX, Bai, JM, Wang, LP, Choi, YJ & Cheong, SW 2010, 'Observation of anomalous phonons in orthorhombic rare-earth manganites', Applied Physics Letters, vol. 97, no. 26, 262905. https://doi.org/10.1063/1.3533022

Observation of anomalous phonons in orthorhombic rare-earth manganites. / Gao, P.; Chen, H. Y.; Tyson, T. A.; Liu, Z. X.; Bai, J. M.; Wang, L. P.; Choi, Y. J.; Cheong, S. W.

In: Applied Physics Letters, Vol. 97, No. 26, 262905, 27.12.2010.

Research output: Contribution to journalArticle

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AU - Chen, H. Y.

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AU - Liu, Z. X.

AU - Bai, J. M.

AU - Wang, L. P.

AU - Choi, Y. J.

AU - Cheong, S. W.

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AB - 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.

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Gao P, Chen HY, Tyson TA, Liu ZX, Bai JM, Wang LP et al. Observation of anomalous phonons in orthorhombic rare-earth manganites. Applied Physics Letters. 2010 Dec 27;97(26). 262905. https://doi.org/10.1063/1.3533022