Abstract
Dimethylammonium copper (II) chloride (also known as DMACuCl3 or MCCL) is a low-dimensional S = frac(1, 2) quantum spin system proposed to be an alternating ferro-antiferromagnetic chain with similar magnitude ferromagnetic (FM) and antiferromagnetic (AFM) exchange interactions. Subsequently, it was shown that the existing bulk measurements could be adequately modeled by considering DMACuCl3 as independent AFM and FM dimer spin pairs. We present here new inelastic neutron scattering measurements of the spin excitations in single crystals of DMACuCl3. These results show significant quasi-one-dimensional coupling, however the magnetic excitations do not propagate along the expected direction. We observe a band of excitations with a gap of Δ=0.95 MeV and a bandwidth of 0.82 MeV.
Original language | English |
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Pages (from-to) | 438-440 |
Number of pages | 3 |
Journal | Physica B: Physics of Condensed Matter |
Volume | 385-386 I |
DOIs | |
State | Published - Nov 27 2006 |
Funding
Oak Ridge National laboratory is managed by UT-Battelle, LLC, for DOE under DE-AC05-00OR22725. Work at SPINS supported by the National Science Foundation under Agreement no. DMR-9986442, and the National Institute of Standards and Technology, US Department of Commerce. We acknowledge valuable discussions with M.W. Meisel.
Funders | Funder number |
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National Science Foundation | DMR-9986442 |
Directorate for Mathematical and Physical Sciences | 9986442 |
National Institute of Standards and Technology | |
U.S. Department of Commerce |
Keywords
- Antiferromagnet
- Low dimensional
- Organo-metallic
- S = frac(1, 2)