Dimensional Reduction in Quantum Dipolar Antiferromagnets

P. Babkevich, M. Jeong, Y. Matsumoto, I. Kovacevic, A. Finco, R. Toft-Petersen, C. Ritter, M. Månsson, S. Nakatsuji, and H. M. Rønnow
Phys. Rev. Lett. 116, 197202 – Published 10 May 2016
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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/h4 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 TN, 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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  • Received 13 January 2016

DOI:https://doi.org/10.1103/PhysRevLett.116.197202

© 2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

P. Babkevich1,*, M. Jeong1, Y. Matsumoto2, I. Kovacevic1, A. Finco1,3, R. Toft-Petersen4, C. Ritter5, M. Månsson1,6,7, S. Nakatsuji2, and H. M. Rønnow1

  • 1Laboratory for Quantum Magnetism, Institute of Condensed Matter Physics (ICMP), Ecole Polytechnique Féderale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
  • 2Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
  • 3ICFP, Département de physique, École normale supérieure, 45 rue d’Ulm, 75005 Paris, France
  • 4Helmholtz-Zentrum Berlin für Materialien und Energie, D-14109 Berlin, Germany
  • 5Institut Laue-Langevin, BP 156, F-38042, Grenoble Cedex 9, France
  • 6Laboratory for Neutron Scattering, Paul Scherrer Institut, CH-5232 Villigen, Switzerland
  • 7Department of Materials and Nanophysics, KTH Royal Institute of Technology, SE-164 40 Kista, Sweden

  • *peter.babkevich@epfl.ch

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Issue

Vol. 116, Iss. 19 — 13 May 2016

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