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Excitation Spectra in the Spin-½ Antiferromagnetic Chain with Bond Alternation

✍ Scribed by Yin-Zhong Wu; Zhen-Ya Li


Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
125 KB
Volume
213
Category
Article
ISSN
0370-1972

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We measured the spin-excitation spectrum for the quasi-one-dimensional S = 1 antiferromagnet [Ni(C3HloN2)2] NO2(C104) (NINO) and NINO with nominally 5 at% Cu 2 + impurities (N1NO : Cu 2 +) by inelastic neutron scattering. We clearly observed a peak corresponding to an energy gap E~ = 1.2 meV ( ~ 14