This title appears in the Scientific Report :
2021
Please use the identifier:
http://hdl.handle.net/2128/28653 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.104.L020403 in citations.
Spin dynamics study and experimental realization of tunable single-ion anisotropy in multiferroic Ba 2 CoGe 2 O 7 under external magnetic fields
Spin dynamics study and experimental realization of tunable single-ion anisotropy in multiferroic Ba 2 CoGe 2 O 7 under external magnetic fields
We report a spin-wave study on multiferroic Ba2CoGe2O7 under magnetic fields up to 12 T using low-energyinelastic neutron scattering. In-plane transverse (T1) spin-wave modes are highly dispersive along (h00) andrather flat but strong in intensity along (30l). In addition, two dispersive electromagn...
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Personal Name(s): | Dutta, Rajesh (Corresponding author) |
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Thoma, Henrik / Radelytskyi, Igor / Schneidewind, Astrid / Kocsis, Vilmos / Tokunaga, Yusuke / Taguchi, Yasujiro / Tokura, Yoshinori / Hutanu, Vladimir | |
Contributing Institute: |
Heinz Maier-Leibnitz Zentrum; MLZ Streumethoden; JCNS-2 JCNS-4; JCNS-4 JCNS-FRM-II; JCNS-FRM-II |
Published in: | Physical review / B, 104 (2021) 2, S. L020403 |
Imprint: |
Woodbury, NY
Inst.
2021
|
DOI: |
10.1103/PhysRevB.104.L020403 |
Document Type: |
Journal Article |
Research Program: |
Jülich Centre for Neutron Research (JCNS) (FZJ) Materials – Quantum, Complex and Functional Materials |
Subject (ZB): | |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.104.L020403 in citations.
We report a spin-wave study on multiferroic Ba2CoGe2O7 under magnetic fields up to 12 T using low-energyinelastic neutron scattering. In-plane transverse (T1) spin-wave modes are highly dispersive along (h00) andrather flat but strong in intensity along (30l). In addition, two dispersive electromagnon modes have beenobserved around 3.5 meV. Dispersion of the out-of-plane transverse modes (T2) under fields reveals that thesingle-ion anisotropy constant decreases with increasing magnetic field, which is consistent with the linearspin-wave theory. Our results imply that the field-dependent single-ion anisotropy plays a crucial role indetermining the characteristics of T2 and electromagnon modes in the three-dimensional anisotropic spin-wavespectrum. |