Magnetic properties and spin dynamics in hole-doped S = 1 AF chain: Y-89 NMR and susceptibility in Y2-xCaxBaNiO5

Authors
Tedoldi, F Rigamonti, A Brugna, C Corti, M Lascialfari, A Capsoni, D Massarotti, V
Citation
F. Tedoldi et al., Magnetic properties and spin dynamics in hole-doped S = 1 AF chain: Y-89 NMR and susceptibility in Y2-xCaxBaNiO5, J APPL PHYS, 83(11), 1998, pp. 6605-6607
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF APPLIED PHYSICS
ISSN journal
00218979 → ACNP
Volume
83
Issue
11
Year of publication
1998
Part
2
Pages
6605 - 6607
Database
ISI
SICI code
0021-8979(19980601)83:11<6605:MPASDI>2.0.ZU;2-2
Abstract
Hole-doping effects in Haldane chain have been studied by means of magnetic susceptibility and Y-89 nuclear magnetic resonance in Y2-xCaxBaNiO5 for x = 0, x = 0.06 and x = 0.18. In nominally pure YBNO detailed information on this prototype of Haldane systems is extracted. In the charge-doped compoun ds the Y-89 relaxation rates indicate that holes induce low-energy excitati ons with an effective spectral density having a structure characterized by a narrow central peak. (C) 1998 American Institute of Physics.