Spin dynamics in the linear-chain {ital S}=1 antiferromagnet Ni(C{sub 3}H{sub 10}N{sub 2}){sub 2}N{sub 3}(ClO{sub 4})
- Department of Physics, Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
- Department of Physics and the Center for Ultralow Temperature Research, University of Florida, Gainesville, Florida 32611-8440 (United States)
- Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200 (United States)
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.}
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016; AC05-96OR22464
- OSTI ID:
- 286109
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 53, Issue 22; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Haldane-gap excitations in the low-H{sub c} one-dimensional quantum antiferromagnet Ni(C{sub 5}D{sub 14}N{sub 2}){sub 2}N{sub 3}(PF{sub 6})
Structure- and orientation-dependent magnetic susceptibility of tetramethylammonium nickel nitrite, (CH{sub 3}){sub 4}N[Ni(NO{sub 2}){sub 3}]: An S = 1 one-dimensional Heisenberg antiferromagnet