Orbital and spin excitations in cobalt oxide

By means of neutron scattering we have determined new branches of magnetic excitations in orbitally active CoO ( T N=290 K) up to 15 THz and for temperatures from 6 to 450 K. Data were taken in the (1 1 1) direction in six single-crystal zones. From the dependence on temperature and Q we have identi...

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Published inPhysica. B, Condensed matter Vol. 403; no. 5; pp. 1406 - 1407
Main Authors Yamani, Z., Buyers, W.J.L., Cowley, R.A., Prabhakaran, D.
Format Journal Article Conference Proceeding
LanguageEnglish
Published Amsterdam Elsevier B.V 01.04.2008
Elsevier
Subjects
Exact sciences and technology
Neutron scattering
Physics
Spin-waves
Transition metal compounds
Transition metal compounds
Neutron scattering
Spin-waves
Cobalt oxide
Monocrystals
Spin waves
Temperature effects
Transition element compounds
Crystal field
Spin state
Neutron diffusion
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Summary:By means of neutron scattering we have determined new branches of magnetic excitations in orbitally active CoO ( T N=290 K) up to 15 THz and for temperatures from 6 to 450 K. Data were taken in the (1 1 1) direction in six single-crystal zones. From the dependence on temperature and Q we have identified several branches of magnetic excitation. We describe a model for the coupled orbital and spin states of Co 2+ subject to a crystal field and tetragonal distortion.
Bibliography:SourceType-Scholarly Journals-2
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ISSN:0921-4526
1873-2135
DOI:10.1016/j.physb.2007.10.306