Resonant X-ray scattering from orbital ordering in LaMnO3

被引：559

作者：

Murakami, Y ^{[1
]}

Hill, JP

Gibbs, D

Blume, M

Koyama, I

Tanaka, M

Kawata, H

Arima, T

Tokura, Y

Hirota, K

Endoh, Y

机构：

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

[2] CREST, Tsukuba, Ibaraki 3050047, Japan

[3] Brookhaven Natl Lab, Dept Phys, Upton, NY 11973 USA

[4] Univ Tsukuba, Inst Mat Sci, Tsukuba, Ibaraki 3058573, Japan

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

[6] JRCAT, Tsukuba, Ibaraki 3050046, Japan

[7] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.81.582

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Dipole resonant x-ray scattering from ordered Mn 3d orbitals in LaMnO3 has been observed near the Mn K-absorption edge. The polarization of the scattered photons is rotated from sigma to pi' and the azimuthal angle dependence shows a characteristic twofold symmetry. A theory for the resonant scattering mechanism has been developed by considering the splitting of the Mn 4p levels due to the Mn 3d orbital ordering. The order parameter of the orbital ordering decreases above the Neel temperature (T-N = 140 K) and disappears at T-0 = 780 K, concomitant with a structural phase transition.

引用

页码：582 / 585

页数：4

共 28 条

[1]

Blume M., 1994, RESONANT ANOMALOUS X

[2]

CHABARA K, 1993, APPL PHYS LETT, V63, P1990

[3] FORBIDDEN REFLECTIONS DUE TO ANISOTROPIC X-RAY SUSCEPTIBILITY OF CRYSTALS [J].