Strong spin-lattice coupling in multiferroic hexagonal manganite YMnO3 probed by ultrafast optical spectroscopy

Title
Strong spin-lattice coupling in multiferroic hexagonal manganite YMnO3 probed by ultrafast optical spectroscopy
Authors
Jang, K.J.; Lee, H.G.; Lee, S.; Ahn, J.; Ahn, J.S.; Hur, N.; Cheong, S.W.
Keywords
antiferromagnetic materials, high-speed optical techniques
Issue Date
2010-07
Publisher
AMER INST PHYSICS
Abstract
We report the observation of spin-lattice coupling in multiferroic YMnO3 by femtosecond near-infrared pump and probe spectroscopy. A coherent 31 GHz acoustic phonon was detected above the magnetic ordering temperature, and a higher frequency coherent mode was observed in the antiferromagnetic phase. This temperature-dependent measurement demonstrates that the acoustic phonon excitation is coupled to spin ordering.
URI
http://dspace.inha.ac.kr/handle/10505/20108
ISSN
0003-6951
Appears in Collections:
College of Natural Science(자연과학대학) > Physics (물리학) > Journal Papers, Peports(물리학 학술논문, 보고서)
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