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@ARTICLE{Altynbaev:824265,
      author       = {Altynbaev, E. and Siegfried, S.-A. and Moskvin, E. and
                      Menzel, D. and Dewhurst, C. and Heinemann, A. and
                      Feoktystov, A. and Fomicheva, L. and Tsvyashchenko, A. and
                      Grigoriev, S.},
      title        = {{H}idden quantum phase transition in {M}n$_{1−x}$
                      {F}e$_{x}$ {G}e evidenced by small-angle neutron scattering},
      journal      = {Physical review / B},
      volume       = {94},
      number       = {17},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2016-06884},
      pages        = {174403},
      year         = {2016},
      abstract     = {The magnetic system of the Mn1−xFexGe solid solution is
                      ordered in a spiral spin structure in the whole
                      concentration range of x∈[0÷1]. The close inspection of
                      the small-angle neutron-scattering data reveals the quantum
                      phase transition from the long-range ordered to short-range
                      ordered helical structure upon increase of Fe concentration
                      at x∈[0.25÷0.4]. The short-range order (SRO) of the
                      helical structure is identified as a Lorentzian
                      contribution, while long-range order is associated with the
                      Gaussian contribution into the scattering profile function.
                      The scenario of the quantum phase transition with x as a
                      driving parameter is similar to the thermal phase transition
                      in pure MnGe. The quantum nature of the SRO is proved by the
                      temperature-independent correlation length of the helical
                      structure at low- and intermediate-temperature ranges with
                      remarkable decrease above certain temperature TQ. We suggest
                      the x-dependent modification of the effective
                      Ruderman-Kittel-Kasuya-Yosida exchange interaction within
                      the Heisenberg model of magnetism to explain the quantum
                      critical regime in Mn1−xFexGe.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II / JCNS-2 / PGI-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106},
      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)KWS1-20140101 / EXP:(DE-MLZ)SANS-1-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000386656100003},
      doi          = {10.1103/PhysRevB.94.174403},
      url          = {https://juser.fz-juelich.de/record/824265},
}