Huang Wei-Hong, Wei Hao-Keng, Quyen Nguyen Nhat, Yang Pei-Tsung, Cheng Yi-Cheng, Wang Yu-Ting, Ko Ying-Kuan, Tu Chien-Ming, Yabushita Atsushi, Luo Chih-Wei
Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan.
Institute of Physics and Center for Emergent Functional Matter Science, National Yang Ming Chiao Tung University, Hsinchu 300093, Taiwan.
Materials (Basel). 2022 Jul 26;15(15):5188. doi: 10.3390/ma15155188.
A complete temperature-dependent scheme of the Mn on-site d-d transitions in multiferroic hexagonal HoMnO (-HoMnO) thin films was unveiled by energy-resolved ultrafast spectroscopy. The results unambiguously revealed that the ultrafast responses of the and states differed significantly in the hexagonal HoMnO. We demonstrated that the short-range antiferromagnetic and ferroelectric orderings are more relevant to the state, whereas the long-range antiferromagnetic ordering is intimately coupled to both the and states. Moreover, the primary thermalization times of the and states were 0.34 ± 0.08 ps and 0.38 ± 0.08 ps, respectively.
通过能量分辨超快光谱揭示了多铁性六角形 HoMnO₃（-HoMnO₃）薄膜中 Mn 在位 d-d 跃迁的完整温度依赖方案。结果明确显示，六角形 HoMnO₃ 中 和 态的超快响应存在显著差异。我们证明，短程反铁磁和铁电有序与 态更为相关，而长程反铁磁有序则与 和 态紧密耦合。此外， 和 态的主要热化时间分别为 0.34 ± 0.08 皮秒和 0.38 ± 0.08 皮秒。
