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Dimensional Reduction in Quantum Dipolar Antiferromagnets
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2016 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 116, no 19, 197202Article in journal (Refereed) PublishedText
Abstract [en]

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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American Physical Society , 2016. Vol. 116, no 19, 197202
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URN: urn:nbn:se:kth:diva-188442DOI: 10.1103/PhysRevLett.116.197202ISI: 000376011500003PubMedID: 27232040ScopusID: 2-s2.0-84968830386OAI: diva2:936448
Swedish Research Council, INCA-2014-6426

QC 20160614

Available from: 2016-06-14 Created: 2016-06-10 Last updated: 2016-06-14Bibliographically approved

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Material Physics, MF
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