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Correlation between magnon and magnetic symmetries of hexagonal RMnO3 (R = Er, Ho, Lu)

Title
Correlation between magnon and magnetic symmetries of hexagonal RMnO3 (R = Er, Ho, Lu)
Authors
Thi Minh Hien NguyenThi Huyen NguyenChen, Xiang-BaiPark, YeonjuJung, Young MeeLee, D.Noh, T. W.Cheong, Sang-WookYang, In-Sang
Ewha Authors
양인상
SCOPUS Author ID
양인상scopus
Issue Date
2016
Journal Title
JOURNAL OF MOLECULAR STRUCTURE
ISSN
0022-2860JCR Link1872-8014JCR Link
Citation
vol. 1124, pp. 103 - 109
Keywords
Hexagonal manganite RMnO3Raman spectroscopyMagnon scattering2D correlation spectroscopyMagnetic symmetries
Publisher
ELSEVIER SCIENCE BV
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The correlation between the magnon scattering and the magnetic symmetries of hexagonal RMnO3 (R = Er, Ho) thin films and LuMnO3 single crystal was studied through the 2D Correlation Spectroscopy (2D COS) and Perturbation-Correlation Moving Window 2D (PCMW2D) Correlation Spectroscopy which were performed on the temperature-dependent Raman spectra of RMnO3 (R = Er, Ho, Lu). From the Raman spectra, we observed much stronger intensity and more asymmetrical magnon peak in LuMnO3 single crystal than in ErMnO3 and HoMnO3 thin films. While the ratio between magnon and phonon's linewidth of LuMnO3 and HoMnO3 display an anomalous behavior, that ratio of ErMnO3 is almost stable. The result from PCMW2D also supports these results. In addition, our 2D COS analysis showed that there are more overlap peaks in broad four-spin flipping magnon peak in LuMnO3 than that in ErMnO3 and HoMnO3. The differences of hexagonal RMnO3 (R = Er, Ho, Lu) in magnon scattering are very similar to the actual differences of the magnetic symmetries of these compounds. Therefore, we suggest that the magnon scattering of hexagonal RMnO3 is strongly correlated with the magnetic symmetries of these materials. (C) 2016 Elsevier B.V. All rights reserved.
DOI
10.1016/j.molstruc.2016.03.043
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자연과학대학 > 물리학전공 > Journal papers
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