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Author Zheludev, A. ♦ Nagler, S. E. ♦ Shapiro, S. M. ♦ Chou, L. K. ♦ Talham, D. R. ♦ Meisel, M. W.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ANTIFERROMAGNETIC MATERIALS ♦ COLLECTIVE EXCITATIONS ♦ ORGANIC NITROGEN COMPOUNDS ♦ NICKEL COMPOUNDS ♦ CHLORATES ♦ INELASTIC SCATTERING ♦ NEUTRON BEAMS ♦ DISPERSION RELATIONS ♦ ENERGY GAP ♦ TEMPERATURE DEPENDENCE ♦ TEMPERATURE RANGE 0000-0013 K ♦ TEMPERATURE RANGE 0013-0065 K
Abstract Magnetic excitations in the quasi-one-dimensional Heisenberg spin-1 antiferromagnet Ni(C{sub 3}H{sub 10}N{sub 2}){sub 2}N{sub 3}(ClO{sub 4}) (NINAZ) have been studied by single-crystal inelastic neutron scattering. A Haldane gap {Delta}{approx_equal}3.6 meV in the spin excitation spectrum was observed in the vicinity of the antiferromagnetic wave vector at low temperature and the dispersion relation was measured. The temperature dependence of the energy gap {Delta}({ital T}) was measured in the range 8{endash}50 K and was found to be inconsistent with the predictions of the quantum nonlinear {sigma} model. The results are discussed in comparison with those found in the literature for similar systems. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-06-01
Publisher Department Brookhaven National Lab. (BNL), Upton, NY (United States)
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 53
Issue Number 22
Organization Brookhaven National Lab. (BNL), Upton, NY (United States)


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