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High-pressure inelastic neutron scattering study of the anisotropic S=1 spin chain [ Ni ( HF2 ) ( 3-Clpyradine ) 4 ] B F4

Journal Article · · Physical Review. B
 [1];  [1];  [2];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Wrocław Univ. of Science and Technology (Poland)
  3. Eastern Washington Univ., Cheney, WA (United States)
[Ni(HF2)(3-Clpyradine)4]BF4 (NBCT) is a one-dimensional, S=1 spin-chain material that shows no long-range magnetic order down to thermometer temperatures of 0.1 K. Previous ambient pressure inelastic neutron scattering experiments identified NBCT to be in the large-D quantum paramagnetic phase of the D/J phase diagram, where D is the axial single-ion anisotropy and J is the intrachain superexchange. In this work, we extend the previous experiments to a hydrostatic pressure of 0.9 GPa. By comparing to density matrix renormalization group calculations, we find D/J increases from 1.5 to 3.2 as pressure increases from 0 GPa to 0.9 GPa, which pushes the system further into the large-D phase.
Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
Polish National Agency for Academic Exchange (NAWA); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1864419
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 13 Vol. 105; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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