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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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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
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: University of Warwick, Department of Physics
Official Date: 7 September 2015
Dates:
DateEvent
7 September 2015Published
10 September 2015Accepted
29 May 2015Submitted
DOI: 10.1103/PhysRevB.92.134406
Status: Not Peer Reviewed
Publication Status: Published
Media of Output (format): .txt
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 23 August 2016
Date of first compliant Open Access: 23 August 2016
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIED[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
DMR-1306158National Science Foundationhttp://dx.doi.org/10.13039/100000001
DMR-1157490National Science Foundationhttp://dx.doi.org/10.13039/100000001
UNSPECIFIED[DOE] U.S. Department of Energyhttp://dx.doi.org/10.13039/100000015
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