Ferromagnetic clusters and magnetic polarons as evidenced by ESR in La1.35Sr1.65Mn2O7

被引：57

作者：

Chauvet, O ^{[1
]}

Goglio, G ^{[1
]}

Molinie, P ^{[1
]}

Corraze, B ^{[1
]}

Brohan, L ^{[1
]}

机构：

[1] Inst Mat Nantes, F-44072 Nantes, France

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.81.1102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

La1.35Sr1.65Mn2O7 is investigated in the regime where 3D magnetic order is lost but 2D correlations are strong. ESR shows that the localized t(2g) spins are coupled into intralayer ferromagnetic clusters of tired size. The e(g) carriers form polarons with an effective spin growing from 1/2 to 7. ESR and transport properties suggest that the 3D order originates from the onset of coherence of the ferromagnetic clusters mediated by the propagation of the polarons.

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页码：1102 / 1105

页数：4

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