Energy-Resolved Ultrafast Spectroscopic Investigation on the Spin-Coupled Electronic States in Multiferroic Hexagonal HoMnO3

Wei Hong Huang, Hao Keng Wei, Nguyen Nhat Quyen, Pei Tsung Yang, Yi Cheng Cheng, Yu Ting Wang, Ying Kuan Ko, Chien Ming Tu*, Atsushi Yabushita, Chih Wei Luo*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A complete temperature-dependent scheme of the Mn3+ on-site d-d transitions in multiferroic hexagonal HoMnO3 (h-HoMnO3) thin films was unveiled by energy-resolved ultrafast spectroscopy. The results unambiguously revealed that the ultrafast responses of the e1g and e2g states differed significantly in the hexagonal HoMnO3. We demonstrated that the short-range antiferromagnetic and ferroelectric orderings are more relevant to the e2g state, whereas the long-range antiferromagnetic ordering is intimately coupled to both the e2g and e1g states. Moreover, the primary thermalization times of the e2g and e1g states were 0.34 ± 0.08 ps and 0.38 ± 0.08 ps, respectively.

Original languageEnglish
Article number5188
JournalMaterials
Volume15
Issue number15
DOIs
StatePublished - Aug 2022

Keywords

  • antiferromagnetic ordering
  • ferroelectric ordering
  • multiferroic manganites
  • ultrafast spectroscopy

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