Raman scattering from one and two magnons in magnetoelectric
Abstract
Polarized Raman scattering in magnetoelectric LiNiPO4 shows a sharp resonant peak at 37 cm-1 in the magnetically ordered phase, originating from a one-magnon excitation of Ni2+ S = 1 localized moments at the zone center. Also, a broad component with maximum intensity at ~ 65 cm-1 is observed and successfully modeled in terms of light scattering from two-magnon excitations within the framework of the Fleury-Loudon theory using five relevant exchange parameters, providing an independent experimental confirmation of their values previously obtained with inelastic neutron scattering data in this material. An additional peak at 58 cm-1, already reported in previous works, shows no detectable Zeeman splitting for magnetic fields up to 6 T along the crystallographic a and c directions, excluding one-magnon scattering as a possible assignment for this peak. The possible nature of this excitation is discussed.
- Authors:
-
- Univ. of Campinas (UNICAMP), Sao Paulo (Brazil)
- Ames Lab., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1596726
- Report Number(s):
- IS-J-10147
Journal ID: ISSN 2469-9950; PRBMDO
- Grant/Contract Number:
- 2017/10581-1; 2018/20142-8; 409504/2018-1; 308607/2018-0; AC02-07CH11358
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 101; Journal Issue: 2; Journal ID: ISSN 2469-9950
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Rigitano, D., Vaknin, D., Barberis, G. E., and Granado, E. Raman scattering from one and two magnons in magnetoelectric LiNiPO4. United States: N. p., 2020.
Web. doi:10.1103/PhysRevB.101.024417.
Rigitano, D., Vaknin, D., Barberis, G. E., & Granado, E. Raman scattering from one and two magnons in magnetoelectric LiNiPO4. United States. doi:10.1103/PhysRevB.101.024417.
Rigitano, D., Vaknin, D., Barberis, G. E., and Granado, E. Tue .
"Raman scattering from one and two magnons in magnetoelectric LiNiPO4". United States. doi:10.1103/PhysRevB.101.024417. https://www.osti.gov/servlets/purl/1596726.
@article{osti_1596726,
title = {Raman scattering from one and two magnons in magnetoelectric LiNiPO4},
author = {Rigitano, D. and Vaknin, D. and Barberis, G. E. and Granado, E.},
abstractNote = {Polarized Raman scattering in magnetoelectric LiNiPO4 shows a sharp resonant peak at 37 cm-1 in the magnetically ordered phase, originating from a one-magnon excitation of Ni2+ S = 1 localized moments at the zone center. Also, a broad component with maximum intensity at ~ 65 cm-1 is observed and successfully modeled in terms of light scattering from two-magnon excitations within the framework of the Fleury-Loudon theory using five relevant exchange parameters, providing an independent experimental confirmation of their values previously obtained with inelastic neutron scattering data in this material. An additional peak at 58 cm-1, already reported in previous works, shows no detectable Zeeman splitting for magnetic fields up to 6 T along the crystallographic a and c directions, excluding one-magnon scattering as a possible assignment for this peak. The possible nature of this excitation is discussed.},
doi = {10.1103/PhysRevB.101.024417},
journal = {Physical Review B},
number = 2,
volume = 101,
place = {United States},
year = {2020},
month = {1}
}
Web of Science
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