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  • Babkevich, P., et al. (author)
  • Dimensional Reduction in Quantum Dipolar Antiferromagnets
  • 2016
  • In: Physical Review Letters. - : American Physical Society. - 0031-9007 .- 1079-7114. ; 116:19
  • Journal article (peer-reviewed)abstract
    • We report ac susceptibility, specific heat, and neutron scattering measurements on a dipolar-coupled antiferromagnet LiYbF4. For the thermal transition, the order-parameter critical exponent is found to be 0.20(1) and the specific-heat critical exponent -0.25(1). The exponents agree with the 2D XY/h(4) universality class despite the lack of apparent two-dimensionality in the structure. The order-parameter exponent for the quantum phase transitions is found to be 0.35(1) corresponding to (2 + 1)D. These results are in line with those found for LiErF4 which has the same crystal structure, but largely different T-N, crystal field environment and hyperfine interactions. Our results therefore experimentally establish that the dimensional reduction is universal to quantum dipolar antiferromagnets on a distorted diamond lattice.
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