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

doi:10.1063/1.3533022

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	262905
Journal	Applied Physics Letters
Volume	97
Issue number	26
DOIs	https://doi.org/10.1063/1.3533022
Publication status	Published - 2010 Dec 27

Bibliographical note

Funding Information:
This research was funded by DOE Grant Nos. DE-FG02-07ER46402 (NJIT) and DE-FG02-07ER46382 (Rutgers). The U2A beam line at the National Synchrotron Light Source is supported by COMPRES, the Consortium for Materials Properties Research in Earth Sciences under NSF Cooperative Agreement No. EAR01-35554, U.S. Department of Energy (DOE-BES and NNSA/CDAC). The use of the NSLS at Brookhaven National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-98CH10886.

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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title = "Observation of anomalous phonons in orthorhombic rare-earth manganites",

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.",

author = "P. Gao and Chen, {H. Y.} and Tyson, {T. A.} and Liu, {Z. X.} and Bai, {J. M.} and Wang, {L. P.} and Choi, {Y. J.} and Cheong, {S. W.}",

note = "Funding Information: This research was funded by DOE Grant Nos. DE-FG02-07ER46402 (NJIT) and DE-FG02-07ER46382 (Rutgers). The U2A beam line at the National Synchrotron Light Source is supported by COMPRES, the Consortium for Materials Properties Research in Earth Sciences under NSF Cooperative Agreement No. EAR01-35554, U.S. Department of Energy (DOE-BES and NNSA/CDAC). The use of the NSLS at Brookhaven National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-98CH10886.",

year = "2010",

month = dec,

day = "27",

doi = "10.1063/1.3533022",

language = "English",

volume = "97",

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TY - JOUR

T1 - Observation of anomalous phonons in orthorhombic rare-earth manganites

AU - Gao, P.

AU - Chen, H. Y.

AU - Tyson, T. A.

AU - Liu, Z. X.

AU - Bai, J. M.

AU - Wang, L. P.

AU - Choi, Y. J.

AU - Cheong, S. W.

N1 - Funding Information: This research was funded by DOE Grant Nos. DE-FG02-07ER46402 (NJIT) and DE-FG02-07ER46382 (Rutgers). The U2A beam line at the National Synchrotron Light Source is supported by COMPRES, the Consortium for Materials Properties Research in Earth Sciences under NSF Cooperative Agreement No. EAR01-35554, U.S. Department of Energy (DOE-BES and NNSA/CDAC). The use of the NSLS at Brookhaven National Laboratory was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-98CH10886.

PY - 2010/12/27

Y1 - 2010/12/27

N2 - 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.

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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DO - 10.1063/1.3533022

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JF - Applied Physics Letters

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M1 - 262905

ER -

Observation of anomalous phonons in orthorhombic rare-earth manganites

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