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Data for Magnetic ground state of the two isostructual polymeric quantum magnets [Cu(HF2)(pyrazine)2]SbF6 and [Co(HF2)(pyrazine)2]SbF6 investigated with neutron powder diffraction'
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Brambleby, Jamie, Goddard, Paul, Johnson, R. D., Liu, J., Kaminski, D., Ardavan, A., Steele, A. J., Blundell, S. J., Lancaster, T., Manuel, P., Baker, P. J., Singleton, J., Schwalbe, S. G., Spurgeon, P. M., Tran, H. E., Peterson, P. K., Corbey, J. F. and Manson, J. L. (2015) Data for Magnetic ground state of the two isostructual polymeric quantum magnets [Cu(HF2)(pyrazine)2]SbF6 and [Co(HF2)(pyrazine)2]SbF6 investigated with neutron powder diffraction'. [Dataset]
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PRB 92 134402 (2015).zip Download (2953Kb) |
Official URL: http://dx.doi.org/10.1103/PhysRevB.92.134406
Abstract
The magnetic ground state of two isostructural coordination polymers (i) the quasi two- dimensional S = 1/2 square-lattice antiferromagnet [Cu(HF2 )(pyrazine)2 ]SbF6 ; and (ii) a re- lated compound [Co(HF2)(pyrazine)2]SbF6, were examined with neutron powder diffraction measurements. We find the ordered moments of the Heisenberg S = 1/2 Cu(II) ions in [Cu(HF2)(pyrazine)2]SbF6 are 0.6(1)μb, whilst the ordered moments for the Co(II) ions in [Co(HF2)(pyrazine)2]SbF6 are 3.02(6)μb. For Cu(II), this reduced moment indicates the presence of quantum fluctuations below the ordering temperature. We show from heat capacity and electron spin resonance measurements, that due to the crystal electric field splitting of the S = 3/2 Co(II) ions in [Co(HF2)(pyrazine)2]SbF6, this isostructual polymer also behaves as an effective spin-half magnet at low temperatures. The Co moments in [Co(HF2)(pyrazine)2]SbF6 show strong easy-axis anisotropy, neutron diffraction data which do not support the presence of quantum fluctuations in the ground state and heat capacity data which are consistent with 2D or close to 3D spatial exchange anisotropy.
| Item Type: | Dataset | |||||||||||||||
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| Subjects: | Q Science > QC Physics | |||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
| Type of Data: | Fig2, Fig2_inset, Fig3a, Fig3b, Fig4 (4K), Fig4 (10K), Fig7a, Fig7a_inset, Fig7b, Fig7c, Fig8a, Fig8b, Fig9a, Fig9b, Fig10a, Fig10b | |||||||||||||||
| Library of Congress Subject Headings (LCSH): | Magnets, Polymers, Quantum theory | |||||||||||||||
| Publisher: | Department of Physics, University of Warwick | |||||||||||||||
| Official Date: | 7 September 2015 | |||||||||||||||
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| DOI: | 10.1103/PhysRevB.92.134406 | |||||||||||||||
| Status: | Not Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Media of Output (format): | Txt filetypes | |||||||||||||||
| Access rights to Published version: | Open Access | |||||||||||||||
| RIOXX Funder/Project Grant: |
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| Open Access Version: |
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