| Download | - View final version: Unusual behaviour of the spin-phonon coupling in the quasi-one-dimensional antiferromagnet RbCoCl₃ (PDF, 1.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1038/s41598-022-18073-3 |
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| Author | Search for: Cottam, M. G.; Search for: Lockwood, D. J.1 |
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| Affiliation | - National Research Council of Canada. Metrology Research Centre
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| Format | Text, Article |
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| Subject | materials science; optics and photonics; physics |
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| Abstract | We present an experimental and theoretical study for the lattice vibrational (phonon) modes in the quasi-one-dimensional (or chain-like) antiferromagnet RbCoCl₃ at low temperatures both above and below the two different magnetic phase transitions. Clear evidence is found for the role of spin-phonon interactions in providing a temperature-dependent contribution for the frequencies of the E₁g and E₂g symmetry phonons that occur with frequencies comparable to those of the spin wave excitations (magnons) in this compound. The behaviour in RbCoCl₃, as studied here by Raman scattering experiments, is quite different from that typically observed in rutile-structure antiferromagnets where the spin-phonon coupling has been well characterized. The theory is modified to take account of the strong Ising-like component in the spin Hamiltonian. This enables the spin-phonon coupling parameters to be deduced, with the analysis also revealing the onset of an extra frequency shift for the phonons below the transition temperature Tₙ₁ = 28 K associated with magnetic ordering along the Co chains. |
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| Publication date | 2022-08-18 |
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| Publisher | Springer Nature |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Identifier | 18073 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 19234cc3-77cd-447a-b6b3-afec39701015 |
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| Record created | 2023-07-13 |
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| Record modified | 2024-01-23 |
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