Presumption for a Quantum Energy Gap in the Quasi-One-Dimensional <i>S</i> = 1 Heisenberg Antiferromagnet Ni(C <sub>2</sub> H <sub>8</sub> N <sub>2</sub> ) <sub>2</sub> NO <sub>2</sub> (ClO <sub>4</sub> )
J.P. RenardInstitut d'Electronique Fondamentale, CNRS UA 022, Bâtiment 220, Université Paris-Sud, 91405 Orsay, FranceM. VerdaguerENS, Le Parc, 92211 - Saint-Cloud, FranceL. P. RégnaultCentre d'Etudes Nucléaires de Grenoble, DRF/SPh-MDN, 85X, 38041 Grenoble Cedex, FranceW. A. C. ErkelensCentre d'Etudes Nucléaires de Grenoble, DRF/SPh-MDN, 85X, 38041 Grenoble Cedex, FranceJ. Rossat‐MignodCentre d'Etudes Nucléaires de Grenoble, DRF/SPh-MDN, 85X, 38041 Grenoble Cedex, FranceW. G. StirlingInstitut Laue Langevin, 156X, 38042 Grenoble Cedex, France
1987en
ABI
Annotatsiya
Magnetic susceptibility and inelastic neutron scattering experiments have been performed in the nearly ideal one-dimensional Heisenberg antiferromagnet with spin one, Ni(C2H8N2)2NO2ClO4. The experimental results are consistent with the recent theoretical predictions for a quantum energy gap between the ground state and the first excited states.
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