Re-order parameter of interacting thermodynamic magnets
Byung Cheol Park,
Howon Lee,
Sang Hyup Oh,
Hyun Jun Shin,
Young Jai Choi (phylove@yonsei.ac.kr) and
Taewoo Ha (bspha77@gmail.com)
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Byung Cheol Park: Sungkyunkwan University
Howon Lee: Yonsei University
Sang Hyup Oh: Yonsei University
Hyun Jun Shin: Yonsei University
Young Jai Choi: Yonsei University
Taewoo Ha: Sungkyunkwan University
Nature Communications, 2024, vol. 15, issue 1, 1-7
Abstract:
Abstract Phase diagrams of materials are typically based on a static order parameter, but it faces challenges when distinguishing subtle phase changes, such as re-ordering. Here, we report a dynamic nonequilibrium order parameter termed re-order parameter to determine subtle phases and their transitions in interacting magnets. The dynamical precession of magnetization, so-called magnon, premises as a reliable re-order parameter of strong spin-orbit coupled magnets. We employ orthoferrites YFeO3 and its Mn-doped variations, where diverse magnetic phases, including canted antiferromagnetic (Γ4) and collinear antiferromagnetic (Γ1) states, have been well-established. Low-energy magnon uncovers the spin-orbit coupling-induced subtle magnetic structures, resulting in distinct terahertz emissions. The temporal and spectral parameters of magnon emission exhibit characteristics akin to BCS-type order parameters, constructing the magnetic phase diagram of Mn-doped YFeO3. This approach further reveals a concealed ferrimagnetic phase within the Γ1 state, underscoring its potential to search for hidden phases of materials, completing their phase diagrams.
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47637-2
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DOI: 10.1038/s41467-024-47637-2
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