Journal article
Spin dynamics study and experimental realization of tunable single-ion anisotropy in multiferroic Ba2CoGe2O7 under external magnetic fields
Physical review. B, v 104(2), 020403
07 Jul 2021
Abstract
We report a spin-wave study on multiferroic Ba2CoGe2O7 under magnetic fields up to 12 T using low-energy inelastic neutron scattering. In-plane transverse (T-1) spin-wave modes are highly dispersive along (h00) and rather flat but strong in intensity along (30l). In addition, two dispersive electromagnon modes have been observed around 3.5 meV. Dispersion of the out-of-plane transverse modes (T-2) under fields reveals that the single-ion anisotropy constant decreases with increasing magnetic field, which is consistent with the linear spin-wave theory. Our results imply that the field-dependent single-ion anisotropy plays a crucial role in determining the characteristics of T-2 and electromagnon modes in the three-dimensional anisotropic spin-wave spectrum.
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Details
- Title
- Spin dynamics study and experimental realization of tunable single-ion anisotropy in multiferroic Ba2CoGe2O7 under external magnetic fields
- Creators
- Rajesh Dutta - Forschungszentrum JülichHenrik Thoma - RWTH Aachen UniversityIgor Radelytskyi - Forschungszentrum JülichAstrid Schneidewind - Heinz Maier-Leibnitz ZentrumVilmos Kocsis - Leibniz Institute for Solid State and Materials ResearchYusuke Tokunaga - RIKEN Center for Emergent Matter ScienceYasujiro Taguchi - RIKEN Center for Emergent Matter ScienceYoshinori Tokura - The University of TokyoVladimir Hutanu - RWTH Aachen University
- Publication Details
- Physical review. B, v 104(2), 020403
- Publisher
- Amer Physical Soc
- Number of pages
- 5
- Grant note
- Institut fur Kristallographie, RWTH Aachen Universitat Julich Centre for Neutron Science at Heinz Maier-Leibnitz Zentrum
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000671585700003
- Scopus ID
- 2-s2.0-85109901718
- Other Identifier
- 991022004623104721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter