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One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂

One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂

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 e...

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Main Authors: Meloche, E., Cottam, M.G., Lockwood, D.J.
Format: Article
Language:English
Published: Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України 2014
Series:Физика низких температур
Subjects:
К восьмидесятилетию антиферромагнетизма ІІ. Эксперимент
Online Access:http://dspace.nbuv.gov.ua/handle/123456789/119410
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spelling irk-123456789-1194102017-06-07T03:05:07Z One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂ Meloche, E. Cottam, M.G. Lockwood, D.J. К восьмидесятилетию антиферромагнетизма ІІ. Эксперимент 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. 2014 Article 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 en Физика низких температур Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
institution Digital Library of Periodicals of National Academy of Sciences of Ukraine
collection DSpace DC
language English
topic К восьмидесятилетию антиферромагнетизма ІІ. Эксперимент
К восьмидесятилетию антиферромагнетизма ІІ. Эксперимент
spellingShingle К восьмидесятилетию антиферромагнетизма ІІ. Эксперимент
К восьмидесятилетию антиферромагнетизма ІІ. Эксперимент
Meloche, E.
Cottam, M.G.
Lockwood, D.J.
One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂
Физика низких температур
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.
format Article
author Meloche, E.
Cottam, M.G.
Lockwood, D.J.
author_facet Meloche, E.
Cottam, M.G.
Lockwood, D.J.
author_sort Meloche, E.
title One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂
title_short One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂
title_full One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂
title_fullStr One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂
title_full_unstemmed One-magnon and exciton inelastic light scattering in the antiferromagnet CoF₂
title_sort one-magnon and exciton inelastic light scattering in the antiferromagnet cof₂
publisher Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
publishDate 2014
topic_facet К восьмидесятилетию антиферромагнетизма ІІ. Эксперимент
url http://dspace.nbuv.gov.ua/handle/123456789/119410
citation_txt 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.
series Физика низких температур
work_keys_str_mv AT melochee onemagnonandexcitoninelasticlightscatteringintheantiferromagnetcof2
AT cottammg onemagnonandexcitoninelasticlightscatteringintheantiferromagnetcof2
AT lockwooddj onemagnonandexcitoninelasticlightscatteringintheantiferromagnetcof2
first_indexed 2023-10-18T20:34:29Z
last_indexed 2023-10-18T20:34:29Z
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