Spectral signatures of spin-phonon and electron-phonon interactions in multiferroic iron borates

M. N. Popova; K. N. Boldyrev; S. A. Klimin; T. N. Stanislavchuk; A. A. Sirenko; L. N. Bezmaternykh

doi:10.1016/j.jmmm.2014.10.095

Spectral signatures of spin-phonon and electron-phonon interactions in multiferroic iron borates

M. N. Popova, K. N. Boldyrev, S. A. Klimin, T. N. Stanislavchuk, A. A. Sirenko, L. N. Bezmaternykh

Physics

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

High-resolution far-infrared reflection and polarized ellipsometry, as well as Raman scattering temperature-dependent measurements are used to study spin-phonon and electron-phonon interactions in rare-earth (RE) iron borates with the R32 structure of a natural mineral huntite, namely, in RFe₃(BO₃)₄ with R=Pr, Nd, and Sm. Pronounced peculiarities in the ω(T) dependences at the Néel temperature T_N≈32 K are observed for all the compounds studied and the origin of these peculiarities is discussed. A coupling between lattice phonons and crystal-field excitations of a RE ion manifests itself by a renormalization of frequencies and intensities of coupled modes. Modeling of the spectra has revealed the value of about 15 cm^-1 for the electron-phonon coupling constant in PrFe₃(BO₃)₄.

Original language	English (US)
Pages (from-to)	250-254
Number of pages	5
Journal	Journal of Magnetism and Magnetic Materials
Volume	383
DOIs	https://doi.org/10.1016/j.jmmm.2014.10.095
State	Published - Jun 1 2015

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Keywords

Electron-phonon coupling
Optical spectroscopy
Rare-earth iron borates
Spin-phonon interactions

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10.1016/j.jmmm.2014.10.095

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title = "Spectral signatures of spin-phonon and electron-phonon interactions in multiferroic iron borates",

abstract = "High-resolution far-infrared reflection and polarized ellipsometry, as well as Raman scattering temperature-dependent measurements are used to study spin-phonon and electron-phonon interactions in rare-earth (RE) iron borates with the R32 structure of a natural mineral huntite, namely, in RFe3(BO3)4 with R=Pr, Nd, and Sm. Pronounced peculiarities in the ω(T) dependences at the N{\'e}el temperature TN≈32 K are observed for all the compounds studied and the origin of these peculiarities is discussed. A coupling between lattice phonons and crystal-field excitations of a RE ion manifests itself by a renormalization of frequencies and intensities of coupled modes. Modeling of the spectra has revealed the value of about 15 cm-1 for the electron-phonon coupling constant in PrFe3(BO3)4.",

keywords = "Electron-phonon coupling, Optical spectroscopy, Rare-earth iron borates, Spin-phonon interactions",

author = "Popova, \{M. N.\} and Boldyrev, \{K. N.\} and Klimin, \{S. A.\} and Stanislavchuk, \{T. N.\} and Sirenko, \{A. A.\} and Bezmaternykh, \{L. N.\}",

note = "Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2015",

month = jun,

day = "1",

doi = "10.1016/j.jmmm.2014.10.095",

language = "English (US)",

volume = "383",

pages = "250--254",

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TY - JOUR

T1 - Spectral signatures of spin-phonon and electron-phonon interactions in multiferroic iron borates

AU - Popova, M. N.

AU - Boldyrev, K. N.

AU - Klimin, S. A.

AU - Stanislavchuk, T. N.

AU - Sirenko, A. A.

AU - Bezmaternykh, L. N.

PY - 2015/6/1

Y1 - 2015/6/1

N2 - High-resolution far-infrared reflection and polarized ellipsometry, as well as Raman scattering temperature-dependent measurements are used to study spin-phonon and electron-phonon interactions in rare-earth (RE) iron borates with the R32 structure of a natural mineral huntite, namely, in RFe3(BO3)4 with R=Pr, Nd, and Sm. Pronounced peculiarities in the ω(T) dependences at the Néel temperature TN≈32 K are observed for all the compounds studied and the origin of these peculiarities is discussed. A coupling between lattice phonons and crystal-field excitations of a RE ion manifests itself by a renormalization of frequencies and intensities of coupled modes. Modeling of the spectra has revealed the value of about 15 cm-1 for the electron-phonon coupling constant in PrFe3(BO3)4.

AB - High-resolution far-infrared reflection and polarized ellipsometry, as well as Raman scattering temperature-dependent measurements are used to study spin-phonon and electron-phonon interactions in rare-earth (RE) iron borates with the R32 structure of a natural mineral huntite, namely, in RFe3(BO3)4 with R=Pr, Nd, and Sm. Pronounced peculiarities in the ω(T) dependences at the Néel temperature TN≈32 K are observed for all the compounds studied and the origin of these peculiarities is discussed. A coupling between lattice phonons and crystal-field excitations of a RE ion manifests itself by a renormalization of frequencies and intensities of coupled modes. Modeling of the spectra has revealed the value of about 15 cm-1 for the electron-phonon coupling constant in PrFe3(BO3)4.

KW - Electron-phonon coupling

KW - Optical spectroscopy

KW - Rare-earth iron borates

KW - Spin-phonon interactions

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U2 - 10.1016/j.jmmm.2014.10.095

DO - 10.1016/j.jmmm.2014.10.095

M3 - Article

AN - SCOPUS:84939948137

SN - 0304-8853

VL - 383

SP - 250

EP - 254

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

ER -

Spectral signatures of spin-phonon and electron-phonon interactions in multiferroic iron borates

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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