High-temperature neutron diffraction study of the bilayered manganite La1.4Sr1.6Mn2O7 -: art. no. 054115

被引：4

作者：

Malavasi, L

Di Tullio, E

Ründlof, H

Tealdi, C

Flor, G

机构：

[1] Univ Pavia, Dipartimento Chim Fis M Rolla, INSTM, IENI,CNR,Dept Pavia, I-27100 Pavia, Italy

[2] Studsvik Neutron Res Lab, S-61182 Nykoping, Sweden

来源：

PHYSICAL REVIEW B | 2005年 / 72卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.72.054115

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper we present the results of a high-temperature (300 K <= T <= 800 K) neutron powder diffraction study of the La1.4Sr1.6Mn2O7 bilayered manganite. An unusual trend of the < Mn-O-apical>/Mn-O-equatorial parameter was found: it first decreases up to 500 K and then increases up to the highest T measured. At the same time, a significant shortening of the apical Mn-O(2) bond is observed in the range where the Jahn-Teller distortion is reduced. The overall data gained by this study may suggest a shift of electronic density from axial to planar e(g) orbitals with T.

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页数：5

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