Electronic phase separation in La1.2Sr1.8Mn2O7 observed by 55Mn nuclear magnetic resonance

被引：8
|
作者：
Shimizu, K
Velázquez, M
Renard, JP
Revcolevschi, A
机构：
[1] Toyama Univ, Fac Educ, Toyama 9308555, Japan
[2] Univ Paris 11, UMR CNRS 8622, Inst Elect Fondamentale, F-91405 Orsay, France
[3] Univ Paris 11, UMR CNRS 8648, Lab Physicochim Etat Solide, F-91405 Orsay, France
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2003年 / 72卷 / 04期
关键词：
colossal magnetoresistance; nuclear magnetic resonance; electronic phase separation;
D O I：
10.1143/JPSJ.72.793
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A single crystal of perovskite bilayer manganite La1.2Sr1.8Mn2O7 has been studied by the Mn-55 NMR technique. The observed spectra at 4.2 K in zero external magnetic field are broad and spread in the frequency range 310-480 MHz. The shape of the spectrum depends strongly on the rf radiation field for exciting and refocusing a spin-echo signal. In external magnetic fields up to 1.75 T, signals arising from both metallic and insulating phases are observed, which is an evidence of the electronic phase separation.
引用
收藏
页码：793 / 796
页数：4
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