Dynamics and field-induced order in the layered spin S=1/2 dimer system (C5H6N2F)2CuCl4

  title={Dynamics and field-induced order in the layered spin 
 dimer system 
  author={Dominic Blosser and Mladen Horvati'c and R Bewley and Severian Gvasaliya and Andrey Zheludev},
  journal={Physical Review Materials},
The quasi-two-dimensional Heisenberg spin $S=1/2$ dimer system bis(2-amino-5-fluoro-pyridinium) tetrachlorocuprate(II) is studied by means of inelastic neutron scattering, calorimetry and nuclear magnetic resonance (NMR) experiments. In the absence of an applied magnetic field we find dispersive triplet excitations with a spin gap of $\Delta=1.112(15)$ meV and a bandwidth of $0.715(15)$ meV within the layers and $0.116(15)$ meV between the layers, respectively. In an applied magnetic field of… 

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