Terahertz spectroscopy of antiferromagnetic resonances in YFe1-xMnxO3(0 ≤ x ≤ 0:4) across a spin reorientation transition

Howon Lee, Taek Sun Jung, Hyun Jun Shin, Sang Hyup Oh, Kyung Ik Sim, Taewoo Ha, Young Jai Choi, Jae Hoon Kim

Research output: Contribution to journalArticlepeer-review


We have conducted a terahertz spectroscopic study of antiferromagnetic resonances in bulk orthoferrite YFe1-xMnxO3 0 ≤ x ≤ 0.4. Both the quasi-ferromagnetic resonance mode and the quasi-antiferromagnetic resonance mode in the weak ferromagnetic Γ4 phase disappear near the spin reorientation temperature, TSR, for the onset of the collinear antiferromagnetic Γ1 phase (x ≥ 0.1). Below TSR, an antiferromagnetic resonance mode emerges and exhibits a large blueshift with decreasing temperature. However, below 50 K, this mode softens considerably, and this tendency becomes stronger with Mn doping. We provide a deeper understanding of such behaviors of the antiferromagnetic resonance modes in terms of the influence of the Mn3+ ions on the magnetocrystalline anisotropy. Our results show that terahertz time-domain spectroscopy is a useful, complementary tool in tracking magnetic transitions and probing the interaction between disparate magnetic subsystems in antiferromagnetic materials with multiple ionic species.

Original languageEnglish
Article number192903
JournalApplied Physics Letters
Issue number19
Publication statusPublished - 2021 Nov 8

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation (NRF) of Korea grants funded by the Korea government (MIST) (Nos. NRF-2021R1A2C3004989, NRF-2017R1A5A1014862, and NRF-2019R1A2C2002601) and by the Institute for Basic Science (No. IBS-R011-D1).

Publisher Copyright:
© 2021 Author(s).

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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