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

被引：8
|
作者：
Tedoldi, F [1 ]
Rigamonti, A
Brugna, C
Corti, M
Lascialfari, A
Capsoni, D
Massarotti, V
机构：
[1] Univ Pavia, Dipartimento Fis A Volta, INFM, I-27100 Pavia, Italy
[2] Univ Florence, Dept Chem, I-50144 Florence, Italy
[3] Univ Pavia, Dept Phys Chem, I-27100 Pavia, Italy
来源：
JOURNAL OF APPLIED PHYSICS | 1998年 / 83卷 / 11期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1063/1.367608
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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 compounds the Y-89 relaxation rates indicate that holes induce low-energy excitations with an effective spectral density having a structure characterized by a narrow central peak. (C) 1998 American Institute of Physics.
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收藏
页码：6605 / 6607
页数：3
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