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@ARTICLE{Dutta:894442,
author = {Dutta, Rajesh and Thoma, Henrik and Radelytskyi, Igor and
Schneidewind, Astrid and Kocsis, Vilmos and Tokunaga, Yusuke
and Taguchi, Yasujiro and Tokura, Yoshinori and Hutanu,
Vladimir},
title = {{S}pin dynamics study and experimental realization of
tunable single-ion anisotropy in multiferroic {B}a 2
{C}o{G}e 2 {O} 7 under external magnetic fields},
journal = {Physical review / B},
volume = {104},
number = {2},
issn = {2469-9969},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2021-03224},
pages = {L020403},
year = {2021},
abstract = {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.},
cin = {JCNS-FRM-II / JCNS-4 / JCNS-2 / MLZ},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-4-20201012 / I:(DE-Juel1)JCNS-2-20110106 /
I:(DE-588b)4597118-3},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (FZJ) (POF4-6G4)},
pid = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
experiment = {EXP:(DE-MLZ)PANDA-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000671585700003},
doi = {10.1103/PhysRevB.104.L020403},
url = {https://juser.fz-juelich.de/record/894442},
}