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

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

arxiv: cond-mat/0310778 · v1 · submitted 2003-10-31 · ❄️ cond-mat.str-el

Magnetic excitations in La_(1.5)Sr_(0.5)CoO₄

L. M. Helme , A. T. Boothroyd , D. Prabhakaran , F. R. Wondre , C. D. Frost , J. Kulda This is my paper

classification ❄️ cond-mat.str-el

keywords belowexcitationsmagneticantiferromagnetically-orderedaroundcantedchargecheckerboard

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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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Magnetic excitations in La_(1.5)Sr_(0.5)CoO₄

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