Volume and anisotropic spontaneous striction in layered manganites:: Role of charge localization and magnetic interactions

被引：14

作者：

García-Landa, B ^{[1
]}

Marquina, C

Ibarra, MR

Balakrishnan, G

Lees, MR

Paul, DM

机构：

[1] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

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

[3] CSIC, Fac Ciencias, E-50009 Zaragoza, Spain

[4] Univ Warwick, Dept Phys, Coventry CV4 7AL, W Midlands, England

来源：

PHYSICAL REVIEW LETTERS | 2000年 / 84卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.84.995

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

expansion measurements have been performed on single crystals of R2-2xSr1+2x Mn2O7 (R = Pr, Nd, and Dy) over a wide temperature range (4-900 K). Our analysis allows us to give a general explanation for the large lattice anomalies observed in the layered manganites. Localization of the carriers gives rise to volume and anisotropic anomalies in the paramagnetic regime. The anisotropic distortion is enhanced with the establishment of long-range antiferromagnetism,whereas it is quenched by long-range ferromagnetic order.

引用

页码：995 / 998

页数：4

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