One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
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One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂
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| Creator |
Meloche, E.
Cottam, M.G. Lockwood, D.J. |
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| Subject |
К восьмидесятилетию антиферромагнетизма ІІ. Эксперимент
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| Description |
Experimental data are reported for the temperature and polarization dependence of the one-magnon Raman light scattering in the rutile-structure antiferromagnet CoF₂ (Néel temperature TN = 38 K). The low-lying excitons are also investigated at low temperatures and comparisons made with results from earlier Raman, infrared, and neutron scattering work. A detailed analysis of the one-magnon Stokes and anti-Stokes Raman spectra is presented resulting in comprehensive data for the temperature variation up to TN of the one-magnon frequency, line width, and integrated intensity. A theory of the one-magnon scattering and other magnetic transitions is constructed based mainly on a spin S = 3/2 exchange model, extending a simpler effective S = 1/2 approach. The excitation energies and spectral intensities over a broad range of temperatures are obtained using a Green's function equation of motion method that allows for a careful treatment of the single-ion anisotropy. Overall the S = 3/2 theory compares well with the experimental data. |
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| Date |
2017-06-06T18:45:53Z
2017-06-06T18:45:53Z 2014 |
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Article
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| Identifier |
One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂ / E. Meloche, M.G. Cottam, D.J. Lockwood // Физика низких температур. — 2014. — Т. 40, № 2. — С. 173-186. — Бібліогр.: 21 назв. — англ.
0132-6414 PACS 75.30.Ds, 72.10.Вb, 78.30.–j, 75.50.Ee http://dspace.nbuv.gov.ua/handle/123456789/119410 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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