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

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

2003-10-31

arxiv.org/abs/cond-mat/0310778v1

Physica B 350 (2004) e273-e275

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1016/j.physb.2004.03.068

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.

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