High-resolution polarised Raman scattering study on spin-phonon coupling in multiferroic MnWO4
MnWO _4 passes three antiferromagnetic phase transitions below the Néel temperature T _N = 13.5 K. One of these phases is also ferroelectric and MnWO _4 is therefore referred to as multiferroic. We investigated the effect of magnetic and electric ordering on the lattice dynamics by high-resolution...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2015-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/2/9/096103 |
| _version_ | 1797747255312121856 |
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| author | Fabian Ziegler Holger Gibhardt Jeannis Leist Götz Eckold |
| author_facet | Fabian Ziegler Holger Gibhardt Jeannis Leist Götz Eckold |
| author_sort | Fabian Ziegler |
| collection | DOAJ |
| description | MnWO _4 passes three antiferromagnetic phase transitions below the Néel temperature T _N = 13.5 K. One of these phases is also ferroelectric and MnWO _4 is therefore referred to as multiferroic. We investigated the effect of magnetic and electric ordering on the lattice dynamics by high-resolution polarized Raman spectroscopy. With an accuracy of about 0.02 cm ^−1 , anomalous shifts of nearly all Raman-active phonon wavenumbers were observed below T _N . High-energy metal–oxygen stretching modes soften on cooling, while low-energy vibrations become harder. Due to their linear temperature dependence, these anomalies can be attributed to a higher-order spin–phonon coupling process. The phonon linewidths are unaffected by the magnetic phase transitions and continuously increase with temperature as expected for three-phonon decay processes. |
| first_indexed | 2024-03-12T15:49:13Z |
| format | Article |
| id | doaj.art-b40050d4871f4603b247e5d6fd6ca9dd |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:49:13Z |
| publishDate | 2015-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-b40050d4871f4603b247e5d6fd6ca9dd2023-08-09T15:19:33ZengIOP PublishingMaterials Research Express2053-15912015-01-012909610310.1088/2053-1591/2/9/096103High-resolution polarised Raman scattering study on spin-phonon coupling in multiferroic MnWO4Fabian Ziegler0Holger Gibhardt1Jeannis Leist2Götz Eckold3Institut für Physikalische Chemie, Georg-August-Universität Göttingen , Tammannstr. 6, D-37077 Göttingen, GermanyInstitut für Physikalische Chemie, Georg-August-Universität Göttingen , Tammannstr. 6, D-37077 Göttingen, GermanyInstitut für Physikalische Chemie, Georg-August-Universität Göttingen , Tammannstr. 6, D-37077 Göttingen, GermanyInstitut für Physikalische Chemie, Georg-August-Universität Göttingen , Tammannstr. 6, D-37077 Göttingen, GermanyMnWO _4 passes three antiferromagnetic phase transitions below the Néel temperature T _N = 13.5 K. One of these phases is also ferroelectric and MnWO _4 is therefore referred to as multiferroic. We investigated the effect of magnetic and electric ordering on the lattice dynamics by high-resolution polarized Raman spectroscopy. With an accuracy of about 0.02 cm ^−1 , anomalous shifts of nearly all Raman-active phonon wavenumbers were observed below T _N . High-energy metal–oxygen stretching modes soften on cooling, while low-energy vibrations become harder. Due to their linear temperature dependence, these anomalies can be attributed to a higher-order spin–phonon coupling process. The phonon linewidths are unaffected by the magnetic phase transitions and continuously increase with temperature as expected for three-phonon decay processes.https://doi.org/10.1088/2053-1591/2/9/096103multiferroicsspin-phonon interactionRaman spectroscopy |
| spellingShingle | Fabian Ziegler Holger Gibhardt Jeannis Leist Götz Eckold High-resolution polarised Raman scattering study on spin-phonon coupling in multiferroic MnWO4 Materials Research Express multiferroics spin-phonon interaction Raman spectroscopy |
| title | High-resolution polarised Raman scattering study on spin-phonon coupling in multiferroic MnWO4 |
| title_full | High-resolution polarised Raman scattering study on spin-phonon coupling in multiferroic MnWO4 |
| title_fullStr | High-resolution polarised Raman scattering study on spin-phonon coupling in multiferroic MnWO4 |
| title_full_unstemmed | High-resolution polarised Raman scattering study on spin-phonon coupling in multiferroic MnWO4 |
| title_short | High-resolution polarised Raman scattering study on spin-phonon coupling in multiferroic MnWO4 |
| title_sort | high resolution polarised raman scattering study on spin phonon coupling in multiferroic mnwo4 |
| topic | multiferroics spin-phonon interaction Raman spectroscopy |
| url | https://doi.org/10.1088/2053-1591/2/9/096103 |
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