Spin dynamics of the low-dimensional magnet (CH3)2NH2CuCl3

Matthew B. Stone, Wei Tian, Garrett E. Granroth, Mark D. Lumsden, Jaiho Chung, David G. Mandrus, Stephen E. Nagler

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 languageEnglish
Pages (from-to)438-440
Number of pages3
JournalPhysica B: Condensed Matter
Volume385-386 I
DOIs
Publication statusPublished - 2006 Nov 27
Externally publishedYes

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Keywords

  • Antiferromagnet
  • Low dimensional
  • Organo-metallic
  • S = frac(1, 2)

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Stone, M. B., Tian, W., Granroth, G. E., Lumsden, M. D., Chung, J., Mandrus, D. G., & Nagler, S. E. (2006). Spin dynamics of the low-dimensional magnet (CH3)2NH2CuCl3 Physica B: Condensed Matter, 385-386 I, 438-440. https://doi.org/10.1016/j.physb.2006.05.145