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@ARTICLE{PecanhaAntonio:841162,
      author       = {Pecanha Antonio, Viviane and Feng, Erxi and Su, Yixi and
                      Pomjakushin, Vladimir and Demmel, Franz and Chang, Lieh-Jeng
                      and Aldus, Robert and Xiao, Yinguo and Lees, Martin R. and
                      Brückel, Thomas},
      title        = {{M}agnetic excitations in the ground state of {Y}b$_{2}$
                      {T}i$_{2}$ {O}$_{7}$},
      journal      = {Physical review / B},
      volume       = {96},
      number       = {21},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-08258},
      pages        = {214415},
      year         = {2017},
      abstract     = {We report an extensive study on the zero field ground state
                      of a powder sample of the pyrochlore
                      Yb$_{2}$Ti$_{2}$O$_{7}$. A sharp heat capacity anomaly that
                      labels a low temperature phase transition in this material
                      is observed at 280 mK. Neutron diffraction shows that a
                      quasicollinear ferromagnetic order develops below Tc with a
                      magnetic moment of 0.87(2)μB. High resolution inelastic
                      neutron scattering measurements show, below the phase
                      transition temperature, sharp gapped low-lying magnetic
                      excitations coexisting with a remnant quasielastic
                      contribution likely associated with persistent spin
                      fluctuations. Moreover, a broad inelastic continuum of
                      excitations at ∼0.6 meV is observed from the lowest
                      measured temperature up to at least 2.5 K. At 10 K, the
                      continuum has vanished and a broad quasielastic conventional
                      paramagnetic scattering takes place at the observed energy
                      range. Finally, we show that the exchange parameters
                      obtained within the framework of linear spin-wave theory do
                      not accurately describe the observed zero field inelastic
                      neutron scattering data.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2 / PGI-4 / JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {524 - Controlling Collective States (POF3-524) / 6212 -
                      Quantum Condensed Matter: Magnetism, Superconductivity
                      (POF3-621) / 6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich
                      Centre for Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-524 / G:(DE-HGF)POF3-6212 /
                      G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)DNS-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000417635700002},
      doi          = {10.1103/PhysRevB.96.214415},
      url          = {https://juser.fz-juelich.de/record/841162},
}