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@ARTICLE{Bauer:186690,
      author       = {Bauer, A. and Regnat, A. and Blum, C. G. F. and
                      Gottlieb-Schönmeyer, S. and Pedersen, B. and Meven, M. and
                      Wurmehl, S. and Kuneš, J. and Pfleiderer, C.},
      title        = {{L}ow-temperature properties of single-crystal
                      {C}r{B}$_{2}$},
      journal      = {Physical review / B},
      volume       = {90},
      number       = {6},
      issn         = {1098-0121},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2015-00762},
      pages        = {064414},
      year         = {2014},
      abstract     = {We report the low-temperature properties of 11B enriched
                      single-crystal CrB2 as prepared from high purity Cr and B
                      powder by a solid-state reaction and optical float-zoning.
                      The electrical resistivity, ρxx, Hall effect, ρxy, and
                      specific heat, C, are characteristic of an exchange-enhanced
                      Fermi liquid ground state, which develops a slightly
                      anisotropic spin gap Δ≈220~K below TN=88~K. This
                      observation is corroborated by the absence of a Curie
                      dependence in the magnetisation for T→ 0 reported in the
                      literature. Comparison of C with dxx=dT , where we infer
                      lattice contributions from measurements of VB2, reveals
                      strong antiferromagnetic spin fluctuations with a
                      characteristic spin fluctuation temperature Tsf≈257~K in
                      the paramagnetic state, followed by a pronounced second
                      order mean-field transition at TN, and unusual excitations
                      around ≈TN/2. The pronounced anisotropy of ρxx above TN
                      is characteristic of an easy-plane anisotropy of the spin
                      fluctuations consistent with the magnetisation. The ratio of
                      the Curie-Weiss to the Neel temperatures, f=−ΘCW/TN≈
                      8.5, inferred from the magnetisation, implies strong
                      geometric frustration. All physical properties are
                      remarkably invariant under applied magnetic fields up to
                      14~T, the highest field studied. In contrast to earlier
                      suggestions of local moment magnetism our study identifies
                      CrB2 as a weak itinerant antiferromagnet par excellence with
                      strong geometric frustration.},
      cin          = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
                      (München) ; JCNS-FRM-II},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218},
      pnm          = {54G - JCNS (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-54G24},
      experiment   = {EXP:(DE-MLZ)HEIDI-20140101 / EXP:(DE-MLZ)RESI-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000341104600004},
      doi          = {10.1103/PhysRevB.90.064414},
      url          = {https://juser.fz-juelich.de/record/186690},
}