Magnetic excitations in La1.5Sr0.5CoO4

被引：8

作者：

Helme, L. M. ^{[1
]}

Boothroyd, A. T. ^{[1
]}

Prabhakaran, D. ^{[1
]}

Wondre, F. R. ^{[1
]}

Frost, C. D. ^{[2
]}

Kulda, J. ^{[3
]}

机构：

[1] Univ Oxford, Dept Phys, Oxford OX1 3PU, England

[2] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

[3] Inst Max Von Laue Paul Langevin, F-38042 Grenoble, France

来源：

PHYSICA B-CONDENSED MATTER | 2004年 / 350卷 / 1-3期

基金：

英国工程与自然科学研究理事会;

关键词：

La(1.5)Sr(0.5)CoO(4); Cobaltates; Spin excitations; Charge ordering;

D O I：

10.1016/j.physb.2004.03.068

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report magnetization and neutron scattering measurements of the half-doped compound La(1.5)Sr(0.5)CoO(4), which exhibits a checkerboard pattern of charge ordering below similar to 800 K. In the antiferromagnetically-ordered phase below similar to 40 K the spins are found to be canted in the ab plane. The spin excitation spectrum includes spin-wave excitations with a maximum energy of 16 meV, and diffuse magnetic modes at energies around 30 meV. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：E273 / E275

页数：3

共 6 条

[1] Spin reorientation transition in the incommensurate stripe-ordered phase of La3/2Sr1/2NiO4 -: art. no. 212405 [J].