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

Matthew B. Stone; Wei Tian; Garrett E. Granroth; Mark D. Lumsden; J. H. Chung; David G. Mandrus; Stephen E. Nagler

doi:10.1016/j.physb.2006.05.145

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

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

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

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
Pages (from-to)	438-440
Number of pages	3
Journal	Physica B: Physics of Condensed Matter
Volume	385-386 I
DOIs	https://doi.org/10.1016/j.physb.2006.05.145
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
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)

Access to Document

10.1016/j.physb.2006.05.145

Cite this

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title = "Spin dynamics of the low-dimensional magnet (CH3)2NH2CuCl3",

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.",

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

author = "Stone, {Matthew B.} and Wei Tian and Granroth, {Garrett E.} and Lumsden, {Mark D.} and Chung, {J. H.} and Mandrus, {David G.} and Nagler, {Stephen E.}",

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T1 - Spin dynamics of the low-dimensional magnet (CH3)2NH2CuCl3

AU - Stone, Matthew B.

AU - Tian, Wei

AU - Granroth, Garrett E.

AU - Lumsden, Mark D.

AU - Chung, J. H.

AU - Mandrus, David G.

AU - Nagler, Stephen E.

PY - 2006/11/27

Y1 - 2006/11/27

N2 - 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.

AB - 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.

KW - Antiferromagnet

KW - Low dimensional

KW - Organo-metallic

KW - S = frac(1, 2)

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