NMR study of layered manganite La1.4Sr1.6Mn2O7

被引：3
作者：
Kapusta, C
Riedi, PC
Rybicki, D
Oates, CJ
Zajac, D
Sikora, M
Marquina, C
Ibarra, MR
机构：
[1] AGH Univ Sci & Technol, Fac Phys & Nucl Tech, Dept Solid State Phys, PL-30059 Krakow, Poland
[2] Univ St Andrews, Dept Phys & Astron, St Andrews KY16 9SS, Fife, Scotland
[3] Univ Zaragoza, CSIC, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷
关键词：
nuclear magnetic resonance; colossal magnetoresistance;
D O I：
10.1016/j.jmmm.2003.12.1226
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A Mn-55 nuclear magnetic resonance study of a layered perovskite La1.4Sr1.6Mn2O7 is reported. Between 4.2 K and the magnetic ordering temperature, 100 K, zero field spin echo spectra consist of signals corresponding to the double-exchange (DE) states and charge localized Mn3+, Mn4+ states. This indicates occurrence of electronic and magnetic phase segregation into ferromagnetic metallic and ferromagnetic insulating regions. Above 100 K a DE line is observed, revealing the presence of long lived metallic clusters. The relation of results to magnetoresistive properties of the compound is discussed. (C) 2003 Elsevier B.V. All rights reserved.
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页码：1759 / 1761
页数：3
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