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@ARTICLE{Chatterji:130569,
      author       = {Chatterji, Tapan and Frick, Bernhard and Nair,
                      Harikrishnan},
      title        = {{M}agnetic ordering in double perovskites
                      {R}$_2${C}o{M}n{O}$_6$ ({R} = {Y}, {T}b) investigated by
                      high resolution neutron spectroscopy.},
      journal      = {Journal of physics / Condensed matter},
      volume       = {24},
      number       = {26},
      issn         = {1361-648X},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2013-00937},
      pages        = {266005 -},
      year         = {2012},
      abstract     = {We have investigated low energy nuclear spin excitations in
                      double perovskite compounds R(2)CoMnO(6) (R=Y, Tb) by
                      inelastic neutron scattering with a high resolution
                      back-scattering spectrometer. We observed inelastic signals
                      at about 2.1 μeV for Y(2)CoMnO(6) and also for
                      Tb(2)CoMnO(6) at T = 2 K in both energy-loss and energy-gain
                      sides. We interpret these inelastic peaks to be due to the
                      transitions between the hyperfine split nuclear levels of
                      the (59)Co nucleus. The inelastic peaks move towards the
                      central elastic peak and finally merge with it at the
                      magnetic ordering temperature T(C). The energy of the low
                      energy excitations decreases continuously and becomes zero
                      at T(C) ≈ 75 K for Y(2)CoMnO(6) and T(C) ≈ 100 K for
                      Tb(2)CoMnO(6). For Tb(2)CoMnO(6), which contains magnetic
                      rare earth ions, additional quasielastic scattering due
                      presumably to the fluctuations of large Tb magnetic moments
                      was observed. The present study reveals the magnetic
                      ordering of the Co sublattice. The results of this
                      investigation along with that obtained by us for other
                      compounds indicate the presence of unquenched orbital
                      moments in some of the Co compounds.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / PGI-4 / JCNS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)PGI-4-20110106 / I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {422 - Spin-based and quantum information (POF2-422) / 424 -
                      Exploratory materials and phenomena (POF2-424) / 542 -
                      Neutrons (POF2-542) / 544 - In-house Research with PNI
                      (POF2-544) / 54G - JCNS (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-422 / G:(DE-HGF)POF2-424 /
                      G:(DE-HGF)POF2-542 / G:(DE-HGF)POF2-544 /
                      G:(DE-HGF)POF2-54G24},
      experiment   = {EXP:(DE-MLZ)External-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:22691537},
      UT           = {WOS:000305640800020},
      doi          = {10.1088/0953-8984/24/26/266005},
      url          = {https://juser.fz-juelich.de/record/130569},
}