標題: Magnetization dynamics and the Mn3+ d-d excitation of hexagonal HoMnO3 single crystals using wavelength-tunable time-resolved femtosecond spectroscopy
作者: Shih, H. C.
Lin, T. H.
Luo, C. W.
Lin, J. -Y.
Uen, T. M.
Juang, J. Y.
Wu, K. H.
Lee, J. M.
Chen, J. M.
Kobayashi, T.
電子物理學系
物理研究所
Department of Electrophysics
Institute of Physics
關鍵字: antiferromagnetic materials;holmium compounds;long-range order;magnetic structure;magnetic transitions;magnetisation;Neel temperature;short-range order;time resolved spectroscopy
公開日期: 1-Jul-2009
摘要: We analyze the photo-induced carrier and magnetization dynamics in antiferromagnetic (AFM) HoMnO3 single crystals, delineated by wavelength-dependent femtosecond spectroscopy. The emergence of long-range and short-range magnetic order are unambiguously revealed in association with an abnormal blueshift of Mn3+ 3d level around the Neacuteel temperature and the slope variation in the temperature-dependent transient reflectivity change (Delta R/R) near the Neacuteel transition, respectively. Furthermore, the disturbance (in ps time scale) of the AFM ordering and its reordering time (in a few 100 ps time scale) are clearly identified in the negative Delta R/R.</p>.
URI: http://dx.doi.org/10.1103/PhysRevB.80.024427
http://hdl.handle.net/11536/149813
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.80.024427
期刊: PHYSICAL REVIEW B
Volume: 80
Issue: 2
起始頁: 0
結束頁: 0
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