Journal article · Preprint article
Dimensional Reduction in Quantum Dipolar Antiferromagnets
Laboratory for Quantum Magnetism, Institute of Condensed Matter Physics (ICMP), Ecole Polytechnique Féderale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.1
Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan.2
ICFP, Département de physique, École normale supérieure, 45 rue d'Ulm, 75005 Paris, France.3
Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109 Berlin, Germany.4
Institut Laue-Langevin, BP 156, F-38042, Grenoble Cedex 9, France.5
Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen, Switzerland.6
Department of Materials and Nanophysics, KTH Royal Institute of Technology, SE-164 40 Kista, Sweden.7
We report ac susceptibility, specific heat, and neutron scattering measurements on a dipolar-coupled antiferromagnet LiYbF_{4}. 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 LiErF_{4} 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.
| Language: | English |
|---|---|
| Year: | 2016 |
| Pages: | 197202 |
| ISSN: | 10797114 and 00319007 |
| Types: | Journal article and Preprint article |
| DOI: | 10.1103/PhysRevLett.116.197202 |
