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
收藏
页码：E273 / E275
页数：3
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