The influence of the 16O-18O isotope substitution on spin dynamics of (La0.25Pr0.75)0.7Ca0.3MnO3: 139La NMR data

被引：1
|
作者：
Mikhalev, K. [1 ]
Pogudin, A. [1 ]
Yakubovskii, A. [2 ]
Gorbenko, O. [3 ]
Kaul, A. [3 ]
Kumagai, K. [4 ]
Furukawa, Y. [4 ]
机构：
[1] RAS, Ural Div, Inst Met Phys, Ekaterinburg 620219, Russia
[2] Kurchatov Inst, Russian Res Ctr, Moscow 123182, Russia
[3] Moscow MV Lomonosov State Univ, Moscow 119899, Russia
[4] Hokkaido Univ, Sapporo, Hokkaido 0600810, Japan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2006年 / 300卷 / 01期
关键词：
Isotope-effect; NMR-spectra; Spin-spin relaxation time; Hyperfine fields;
D O I：
10.1016/j.jmmm.2005.10.162
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The La-139 NMR spectra and spin-spin relaxation times have been measured for the O-16 and O-18 isotope-substituted manganite (La0.25Pr0.75)(0.7)Ca0.3MnO3 in the external magnetic field of 5 T. The NMR signal wipe-out has been observed in the O-18-enriched sample in the charge-ordered state. This phenomenon is connected with a sharp increase in the spin-spin relaxation rate. The great isotope-effect observed provides a clear evidence of an essential role of oxygen motion in controlling the long-range magnetic order in manganites. (C) 2005 Elsevier B.V. All rights reserved.
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收藏
页码：E118 / E121
页数：4
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