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 |
Appears in Collections: | Articles |
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