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Data for Extremely well-isolated 2D spin-1/2 antiferromagnetic Heisenberg layers with small exchange coupling in the molecular-based magnet CuPOF
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(2020) Data for Extremely well-isolated 2D spin-1/2 antiferromagnetic Heisenberg layers with small exchange coupling in the molecular-based magnet CuPOF. [Dataset]
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CuPOF_PRB_2020.zip - Published Version Available under License Creative Commons Attribution 4.0. Download (478Kb) |
Abstract
We report on a comprehensive characterization of the newly synthesized Cu2+-based molecular magnet [Cu(pz)2(2−HOpy)2](PF6)2 (CuPOF), where pz=C4H4N2 and 2−HOpy=C5H4NHO. From a comparison of theoretical modeling to results of bulk magnetometry, specific heat, μ+SR, ESR, and NMR spectroscopy, this material is determined as an excellent realization of the two dimensional square-lattice S=12 antiferromagnetic Heisenberg model with a moderate intraplane nearest-neighbor exchange coupling of J/kB=6.80(5) K, and an extremely small interlayer interaction of about 1 mK. At zero field, the bulk magnetometry reveals a temperature-driven crossover of spin correlations from isotropic to XY type, caused by the presence of a weak intrinsic easy-plane anisotropy. A transition to long-range order, driven by the low-temperature XY anisotropy under the influence of the interlayer coupling, occurs at TN=1.38(2) K, as revealed by μ+SR. In applied magnetic fields, our 1H-NMR data reveal a strong increase of the magnetic anisotropy, manifested by a pronounced enhancement of the transition temperature to commensurate long-range order at TN=2.8 K and 7 T.
| Item Type: | Dataset | |||||||||||||||||||||||||||||||||
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| Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||||||||||||||||||||
| Type of Data: | Experimental data | |||||||||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Nuclear magnetic resonance spectroscopy, Antiferromagnetism, Heisenberg uncertainty principle, Lattice theory, Anisotropy | |||||||||||||||||||||||||||||||||
| Publisher: | University of Warwick, Department of Chemistry | |||||||||||||||||||||||||||||||||
| Official Date: | 3 August 2020 | |||||||||||||||||||||||||||||||||
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| Status: | Not Peer Reviewed | |||||||||||||||||||||||||||||||||
| Publication Status: | Published | |||||||||||||||||||||||||||||||||
| Media of Output (format): | .dat, .txt | |||||||||||||||||||||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | |||||||||||||||||||||||||||||||||
| Copyright Holders: | University of Warwick | |||||||||||||||||||||||||||||||||
| Description: | Data record consists of a zip archive containing the raw data in .dat format and the accompanying readme file. |
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| Date of first compliant deposit: | 21 December 2020 | |||||||||||||||||||||||||||||||||
| Date of first compliant Open Access: | 21 December 2020 | |||||||||||||||||||||||||||||||||
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