NMR probe of phase segregation in electron doped mixed valence manganites

被引：45

作者：

Kapusta, C ^{[1
]}

Riedi, PC

Sikora, M

Ibarra, MR

机构：

[1] Stanislaw Staszic Univ Min & Met, 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, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[4] Univ Zaragoza, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.84.4216

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A Mn-55 and La-139 NMR study of Lao(0.35)Ca(0.65)MnO(3) is reported. The zero field Mn-55 spectra consist of two lines centered at 290 and 375 MHz. Their behavior under an applied magnetic field makes it possible to attribute them to regions of antiferromagnetically and ferromagnetically coupled kin spins, respectively. This gives evidence for the existence of electronic phase segregation of microscopic ferromagnetic regions of double exchange coupled Mn spins over a charge ordered antiferromagnetic background. The behavior of these ferromagnetic regions in the applied magnetic field is related to the magnetoresistive properties of the manganites.

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页码：4216 / 4219

页数：4

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