Direct observation of charge and orbital ordering in La0.5Sr1.5MnO4

被引：487

作者：

Murakami, Y ^{[1
]}

Kawada, H

Kawata, H

Tanaka, M

Arima, T

Moritomo, Y

Tokura, Y

机构：

[1] High Energy Accelarator Res Org, Inst Mat Struct Sci, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[2] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3050006, Japan

[3] Nagoya Univ, Ctr Integrated Res Sci & Engn, Nagoya, Aichi 4640814, Japan

[4] Univ Tokyo, Dept Appl Phys, Tokyo 1130033, Japan

[5] Joint Res Ctr Atom Technol, Tsukuba, Ibaraki 3050046, Japan

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.80.1932

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Charge ordering and orbital ordering in La0.5Sr1.5MnO4 have been investigated by using synchrotron x-ray diffraction. The alternating pattern of Mn3+/Mn4+ in real space is observed directly by making use of their anomalous dispersion. The first clear evidence of the orbital ordering of e(g) electrons on Mn3+ is also presented based on the measurements of ATS (anisotropy of the tensor of susceptibility) reflection near the Mn K-absorption edge, The present observations indicate that the charge ordering and orbital ordering occur simultaneously at a transition temperature higher than that of the spin ordering.

引用

页码：1932 / 1935

页数：4

共 25 条

[1] A STRUCTURAL PHASE-TRANSITION INDUCED BY AN EXTERNAL MAGNETIC-FIELD [J].