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Data for Determining the anisotropy and exchange parameters of polycrystalline spin-1 magnets
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(2020) Data for Determining the anisotropy and exchange parameters of polycrystalline spin-1 magnets. [Dataset]
Archive (ZIP) (Data underpinning figures related article)
Blackmore_etal_NJP_data_all.zip - Published Version Available under License Creative Commons Attribution 4.0. Download (5Mb) |
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Read-me.txt - Published Version Available under License Creative Commons Attribution 4.0. Download (7Kb) |
Abstract
Although low-dimensional S = 1 antiferromagnets remain of great interest, difficulty in obtaining high-quality single crystals of the newest materials hinders experimental research in this area. Polycrystalline samples are more readily produced, but there are inherent problems in extracting the magnetic properties of anisotropic systems from powder data. Following a discussion of the effect of powder-averaging on various measurement techniques, we present a methodology to overcome this issue using thermodynamic measurements. In particular we focus on whether it is possible to characterise the magnetic properties of polycrystalline, anisotropic samples using readily available laboratory equipment. We test the efficacy of our method using the magnets [Ni(H2O)2(3,5-lutidine)4](BF4)2 and Ni(H2O)2(acetate)2(4-picoline)2, which have negligible exchange interactions, as well as the antiferromagnet [Ni(H2O)2(pyrazine)2](BF4)2, and show that we are able to extract the anisotropy parameters in each case. The results obtained from the thermodynamic measurements are checked against electron-spin resonance and neutron diffraction. We also present a density functional method, which incorporates spin–orbit coupling to estimate the size of the anisotropy in [Ni(H2O)2(pyrazine)2](BF4)2.
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): | Antiferromagnetism, Polycrystals, Anisotropy | ||||||||||||||||||
Publisher: | University of Warwick, Department of Physics | ||||||||||||||||||
Official Date: | 24 February 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: | Raw data files in .dat format underpinning figs in related publication. Each .dat file is named corresponding to the fig. (e.g. Fig6a.dat corresponds to Fig 6a in the article) |
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Date of first compliant deposit: | 24 February 2020 | ||||||||||||||||||
Date of first compliant Open Access: | 24 February 2020 | ||||||||||||||||||
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