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@ARTICLE{Loewenhaupt:280626,
      author       = {Loewenhaupt, M. and Geselbracht, P. and Faulhaber, E. and
                      Rotter, M. and Doerr, M. and Schmalzl, K. and Schneidewind,
                      A.},
      title        = {{F}ield {D}ependence of the {M}agnetic {P}ropagation
                      {V}ector of the {H}eavy {F}ermion {C}ompound {C}e{C}u2{G}e2
                      {S}tudied by {N}eutron {D}iffraction},
      journal      = {Physics procedia},
      volume       = {75},
      issn         = {1875-3892},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2016-00393},
      pages        = {230 - 237},
      year         = {2015},
      abstract     = {CeCu2Ge2, the counterpart of the heavy-fermion
                      superconductor CeCu2Si2, exhibits an in-commensurate
                      antiferromagnetically long-range ordered ground state with
                      τ = (0.28 0.28 0.54) below TN = 4.15K. The magnetism is
                      strongly affected by a Kondo screening of the Ce 4f-moments
                      by conduction electrons. The similar energy scale of both,
                      Kondo and exchange interactions, results in a complex
                      magnetic phase diagram and gives rise to potential quantum
                      critical phenomena at very low temperatures. We present
                      elastic neutron diffraction data obtained on a CeCu2Ge2
                      single crystal employing the cold triple axis spectrometer
                      PANDA at MLZ and the diffractometer D23 at ILL.The field
                      dependence of the magnetic propagation vector was measured
                      at T ≤ 400 mK in the [110]/[001] plane with vertical
                      magnetic fields applied along [1̄10]. We observe a
                      low-field incommensurate magnetic phase AF1, a first order
                      phase transition around 7.8 T with the coexistence of two
                      phases AF1 and AF2 with slightly different propagation
                      vectors, the disappearance of AF1 at 8 T and the existence
                      of AF2 up to 12 T with a possible modification at 10 T. At
                      12.6 T, yet still well below the value of 26 T of the
                      saturation for magnetic fields in [110] direction, the
                      AF2-type magnetic order is lost and magnetic intensities are
                      not to be found at incommensurate positions in the
                      [110]/[001] plane any more. These new results contradict a
                      previously suggested scenario with a QCP located at 8 T and
                      contribute new information to the B − T phase diagram of
                      CeCu2Ge2 in [110] direction.},
      cin          = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-ILL / JCNS (München) ;
                      Jülich Centre for Neutron Science JCNS (München) ;
                      JCNS-FRM-II},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-ILL-20110128 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      pnm          = {144 - Controlling Collective States (POF3-144) / 524 -
                      Controlling Collective States (POF3-524) / 6212 - Quantum
                      Condensed Matter: Magnetism, Superconductivity (POF3-621) /
                      6213 - Materials and Processes for Energy and Transport
                      Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
                      G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
                      G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)PANDA-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000381129300032},
      doi          = {10.1016/j.phpro.2015.12.028},
      url          = {https://juser.fz-juelich.de/record/280626},
}