Magnetic excitations in La1.5Sr0.5CoO4
L. M. Helme, A. T. Boothroyd, D. Prabhakaran, F. R. Wondre, C. D. Frost, J. Kulda
Abstract
We report magnetization and neutron scattering measurements of the half-doped compound La1.5Sr0.5CoO4, 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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