Magnetic excitations in La$_{1.5}$Sr$_{0.5}$CoO$_4$

L. M. Helme; A. T. Boothroyd; D. Prabhakaran; F. R. Wondre; C. D. Frost; J. Kulda

doi:10.1016/j.physb.2004.03.068

Magnetic excitations in La$_{1.5}$Sr$_{0.5}$CoO$_4$

Strongly Correlated Electrons 2007-05-23 v1

Authors: L. M. Helme , A. T. Boothroyd , D. Prabhakaran , F. R. Wondre , C. D. Frost , J. Kulda

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Abstract

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 ~800K. In the antiferromagnetically-ordered phase below \~40K 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.

Keywords

magnetic excitations La$_{1.5}$Sr$_{0.5}$CoO$_4$ charge ordering spin wave neutron scattering

Cite

@article{arxiv.cond-mat/0310778,
  title  = {Magnetic excitations in La$_{1.5}$Sr$_{0.5}$CoO$_4$},
  author = {L. M. Helme and A. T. Boothroyd and D. Prabhakaran and F. R. Wondre and C. D. Frost and J. Kulda},
  journal= {arXiv preprint arXiv:cond-mat/0310778},
  year   = {2007}
}

Comments

2 pages, 4 figures. Submitted to the Proceedings of the 3rd European Conference on Neutron Scattering (Physica B)

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