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Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange [dataset] Open Access

We present an investigation of the effect of randomizing exchange coupling strengths in the S=1/2 square lattice quasi-two-dimensional quantum Heisenberg antiferromagnet (QHAF) (QuinH)2Cu(ClxBr(1-x)4).2H2O (QuinH = Quinolinium, C9H8N+), with 0<x<1. Pulsed-field magnetization measurements allow us to estimate an effective in-plane exchange strength J in a regime where exchange fosters short-range order, while the temperature TN at which long-range order (LRO) occurs is found using muon-spin relaxation, allowing us to construct a phase diagram for the series. We evaluate the effectiveness of disorder in suppressing TN and the ordered moment size and find an extended disordered phase in the region 0.4<x<0.8 where no magnetic order occurs. The observed critical substitution levels are accounted for by an energetics-based competition between different local magnetic orders. Furthermore, we demonstrate experimentally that the ground state disorder is driven by quantum effects of the exchange randomness, which is a feature that has been predicted theoretically and has implications for other disordered quasi-two-dimensional QHAFs.

Descriptions

Resource type
Dataset
Contributors
Creator: Xiao, F. 1
Creator: Blackmore, W.J.A. 2
Creator: Huddart, B.M. 3
Creator: Gomilsek, M. 4
Creator: Hicken, T.J. 3
Creator: Baines, C 5
Creator: Baker, P.J. 6
Creator: Pratt, F.L. 6
Creator: Blundell, S.J. 7
Creator: Lu, H 8
Creator: Singleton, J 8
Creator: Gawryluk, D 5
Creator: Turnbull, M.M. 9
Creator: Krämer, K.W 1
Creator: Goddard, P.A 2
Creator: Lancaster, T 3
1 University of Bern, Switzerland
2 University of Warwick, UK
3 Durham University, UK
4 Jozsef Stefan Institute, Slovenia
5 Paul Scherrer Institut, Switzerland
6 STFC-ISIS Facility, UK
7 University of Oxford, UK
8 NHMFL, Los Alamos, USA
9 Clark University, USA
Funder
Engineering and Physical Sciences Research Council
European Research Council
Science and Technology Facilities Council
Schweizerische Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Javna Agencija za Raziskovalno Dejavnost RS
National Science Foundation
Research methods
Other description
Keyword
Antiferromagnetism
Exchange reaction
Molecular magenetism
Heisenberg model
Muon spin relaxation and rotation
Subject
Location
Language
English
Cited in
doi:10.1103/PhysRevB.102.174429
Identifier
ark:/32150/r1qz20ss53p
doi:10.15128/r1qz20ss53p
Rights
Creative Commons Attribution 4.0 International (CC BY)

Publisher
Durham University
Date Created

File Details

Depositor
T. Lancaster
Date Uploaded
Date Modified
17 February 2021, 14:02:15
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File format: zip (ZIP Format)
Mime type: application/zip
File size: 13973132
Last modified: 2021:02:16 10:57:02+00:00
Filename: data.zip
Original checksum: 2b480a86a3f1f1b6fa1881f53cf0dbad
Activity of users you follow
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User N. Syrotiuk has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange [dataset] almost 4 years ago
User N. Syrotiuk has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange [dataset] almost 4 years ago
User N. Syrotiuk has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange [dataset] almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has added a new version of Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has updated Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago
User T. Lancaster has added a new version of Magnetic order and disorder in a quasi-two-dimensional quantum Heisenberg antiferromagnet with randomized exchange almost 4 years ago