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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},
}