Interplay between spin dynamics and crystal field in multiferroic compound HoMnO$_3$
| Autor: | M. Deutsch, Virginie Simonet, J.-B. Brubach, X. Fabrèges, L. Pinsard-Gaudart, S. Petit, Alexandre Ivanov, S. de Brion, R. Ballou, Pascal Roy |
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| Přispěvatelé: | Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Cristallographie, Résonance Magnétique et Modélisations (CRM2), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, Institut de Chimie Moléculaire et des Matériaux (MAP/SP2M/ICMMO/UPSaclay-CNRS), Magnétisme et Supraconductivité (MagSup ), Institut Néel (NEEL), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO), Université Paris-Sud - Paris 11 (UP11)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Magnétisme et Supraconductivité (NEEL - MagSup) |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
FOS: Physical sciences 02 engineering and technology inelastic neutron scattering 01 natural sciences Inelastic neutron scattering law.invention Condensed Matter::Materials Science law Spin wave Lattice (order) 0103 physical sciences Multiferroics 010306 general physics Condensed Matter - Materials Science Condensed matter physics Magnon Materials Science (cond-mat.mtrl-sci) 021001 nanoscience & nanotechnology Manganite Synchrotron THz spectroscopy [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] Condensed Matter::Strongly Correlated Electrons dynamical magnetoelectric effect [PHYS.COND.CM-SCE]Physics [physics]/Condensed Matter [cond-mat]/Strongly Correlated Electrons [cond-mat.str-el] 0210 nano-technology Thz spectroscopy |
| Zdroj: | Physical Review B Physical Review B, American Physical Society, 2019, 100 (9), pp.094437. ⟨10.1103/PhysRevB.100.094437⟩ Physical Review B, 2019, 100 (9), pp.094437. ⟨10.1103/PhysRevB.100.094437⟩ |
| ISSN: | 2469-9950 2469-9969 |
| DOI: | 10.48550/arxiv.1903.03009 |
| Popis: | International audience; In the multiferroic hexagonal manganite HoMnO3, inelastic neutron scattering and synchrotron based THz spectroscopy have been used to investigate the spin waves associated to the Mn order together with Ho crystal field excitations. While the Mn order sets in first below 80 K, a spin reorientation occurs below 37 K, a rare feature in the rare earth manganites. We show that several Ho crystal field excitations are present in the same energy range as the magnons, and that they are all affected by the spin reorientation. Moreover, several anomalous features are observed in the excitations at low temperature. Our analysis and calculations for the Mn spin waves and Ho crystal field excitations support Mn-Ho coupling mechanisms as well as coupling to the lattice affecting the dynamics. |
| Databáze: | OpenAIRE |
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