Inelastic neutron scattering study of the spin-gap behavior in Cu 2Te2O5Br2

S. J. Crowe; S. Majumdar; M. R. Lees; D. Mc K. Paul; D. T. Adroja; S. J. Levett

doi:10.1016/j.physb.2005.01.351

Inelastic neutron scattering study of the spin-gap behavior in Cu ₂Te₂O₅Br₂

S. J. Crowe, S. Majumdar, M. R. Lees, D. Mc K. Paul, D. T. Adroja, S. J. Levett

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

1 Citation (Scopus)

Abstract

We present direct observational evidence of a quasi-spin-gapped phase in the spin-tetrahedral system Cu2Te2O5Br2 using inelastic neutron scattering. Our data show a magnetic peak centred at 4.20±0.05 meV, which falls in intensity with increasing temperature in consistence with a thermal depopulation of spin from a non-magnetic ground state to an excited state. However, the magnetic peak also shows a dispersive character, which is associated with the magnetic order in this system.

Original language	English
Pages (from-to)	1219-1221
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	359-361
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2005.01.351
Publication status	Published - 30 Apr 2005
Externally published	Yes

Keywords

Inelastic neutron scattering
Quantum magnetism
Tetrahedral spin-clusters

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2005.01.351

Cite this

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title = "Inelastic neutron scattering study of the spin-gap behavior in Cu 2Te2O5Br2",

abstract = "We present direct observational evidence of a quasi-spin-gapped phase in the spin-tetrahedral system Cu2Te2O5Br2 using inelastic neutron scattering. Our data show a magnetic peak centred at 4.20±0.05 meV, which falls in intensity with increasing temperature in consistence with a thermal depopulation of spin from a non-magnetic ground state to an excited state. However, the magnetic peak also shows a dispersive character, which is associated with the magnetic order in this system.",

keywords = "Inelastic neutron scattering, Quantum magnetism, Tetrahedral spin-clusters",

author = "Crowe, {S. J.} and S. Majumdar and Lees, {M. R.} and Paul, {D. Mc K.} and Adroja, {D. T.} and Levett, {S. J.}",

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doi = "10.1016/j.physb.2005.01.351",

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TY - JOUR

T1 - Inelastic neutron scattering study of the spin-gap behavior in Cu 2Te2O5Br2

AU - Crowe, S. J.

AU - Majumdar, S.

AU - Lees, M. R.

AU - Paul, D. Mc K.

AU - Adroja, D. T.

AU - Levett, S. J.

PY - 2005/4/30

Y1 - 2005/4/30

N2 - We present direct observational evidence of a quasi-spin-gapped phase in the spin-tetrahedral system Cu2Te2O5Br2 using inelastic neutron scattering. Our data show a magnetic peak centred at 4.20±0.05 meV, which falls in intensity with increasing temperature in consistence with a thermal depopulation of spin from a non-magnetic ground state to an excited state. However, the magnetic peak also shows a dispersive character, which is associated with the magnetic order in this system.

AB - We present direct observational evidence of a quasi-spin-gapped phase in the spin-tetrahedral system Cu2Te2O5Br2 using inelastic neutron scattering. Our data show a magnetic peak centred at 4.20±0.05 meV, which falls in intensity with increasing temperature in consistence with a thermal depopulation of spin from a non-magnetic ground state to an excited state. However, the magnetic peak also shows a dispersive character, which is associated with the magnetic order in this system.

KW - Inelastic neutron scattering

KW - Quantum magnetism

KW - Tetrahedral spin-clusters

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DO - 10.1016/j.physb.2005.01.351

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SP - 1219

EP - 1221

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

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