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.

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页码：793 / 796

页数：4

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