Observation of anomalous phonons in orthorhombic rare-earth manganites

Authors

P. Gao, New Jersey Institute of Technology
H. Y. Chen, New Jersey Institute of Technology
T. A. Tyson, New Jersey Institute of Technology
Z. X. Liu, Carnegie Institution of Washington
J. M. Bai, Oak Ridge National Laboratory
L. P. Wang, Stony Brook University
Y. J. Choi, Rutgers Center for Emergent Materials
S. W. Cheong, Rutgers Center for Emergent Materials

Document Type

Article

Publication Date

12-27-2010

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. © 2010 American Institute of Physics.

Identifier

78650918330 (Scopus)

Publication Title

Applied Physics Letters

External Full Text Location

https://doi.org/10.1063/1.3533022

ISSN

00036951

Issue

26

Volume

97

Grant

EAR01-35554

Fund Ref

National Science Foundation

Recommended Citation

Gao, P.; Chen, H. Y.; Tyson, T. A.; Liu, Z. X.; Bai, J. M.; Wang, L. P.; Choi, Y. J.; and Cheong, S. W., "Observation of anomalous phonons in orthorhombic rare-earth manganites" (2010). Faculty Publications. 5864.
https://digitalcommons.njit.edu/fac_pubs/5864