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@ARTICLE{Geselbracht:834691,
      author       = {Geselbracht, P. and Schneidewind, A. and Doerr, M. and
                      Granovsky, S. and Rotter, M. and Loewenhaupt, M. and
                      Scheerer, G. W. and Ren, Z. and Prokeš, K.},
      title        = {{M}agnetic phase diagram of {C}e{C}u 2 {G}e 2 up to 15 {T}:
                      {O}n the route to understand field-induced phase
                      transitions},
      journal      = {Physical review / B},
      volume       = {95},
      number       = {21},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-04594},
      pages        = {214425},
      year         = {2017},
      abstract     = {The features of the magnetic (H,T ) phase diagram of
                      CeCu2Ge2 are similar to those of superconductingCeCu2Si2,
                      but the nature of these phases and transitions is still
                      controversial. For CeCu2Ge2 we present resultson electrical
                      transport, thermodynamic measurements (magnetization,
                      magnetostriction), and elastic neutrondiffraction for fields
                      up to 15 T parallel to the [110] direction. Two magnetic
                      phases AF1, AF2 and a third,yet unidentified ferrimagnetic
                      phase AF3 exist below TN = 4.2 K and in fields up to
                      approximately 26 T. Attemperatures below 2.5 K a first-order
                      transition from AF1 to AF2 at around 7.8 T was found
                      experimentally,characterized by a shift of the observed
                      propagation vector from q1 = (0.285 − 0.285 0.543) to q2 =
                      (0.34 −0.27 0.55). Above 12.5 T reflections belonging
                      neither to the AF1 nor to the AF2 type were found. To
                      interpretthe macroscopic measurements and neutron data a
                      mean-field simulation with the McPhase program was
                      carriedout, yielding a low-field double-q magnetic structure
                      AF1 with q1± = (0.278 ± 0.278 0.556) that jumps toAF2 with
                      q2± = (0.286 ± 0.286 0.545) at about 5 T (to be compared
                      to the experimental value of 7.8 T). Thistransition is
                      followed by a single-q structure AF3 with q3 = (0.28 0.28
                      0.56) at 10 T (as compared to 12.5 Tfrom experiment) that is
                      stable up to saturation at 26 T. These calculations also
                      reveal the principal dependenceof the experimental
                      magnetization and susceptibility published earlier. The
                      predicted single-q structure was notdetectable by neutrons
                      because of limitations in the employed scattering geometry.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106},
      pnm          = {6G15 - FRM II / MLZ (POF3-6G15) / 6G4 - Jülich Centre for
                      Neutron Research (JCNS) (POF3-623)},
      pid          = {G:(DE-HGF)POF3-6G15 / G:(DE-HGF)POF3-6G4},
      experiment   = {EXP:(DE-MLZ)PANDA-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000404463800005},
      doi          = {10.1103/PhysRevB.95.214425},
      url          = {https://juser.fz-juelich.de/record/834691},
}