Orbital and Spin Excitations in Cobalt Oxide

Abstract

By means of neutron scattering we have determined new branches of magnetic excitations in orbitally active CoO (TN=290 K) up to 15 THz and for temperatures from 6 K to 450 K. Data were taken in the (111) 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 Co2+ subject to a crystal field and tetragonal distortion.

To be published in Physica B (Proceedings of SCES07 conference in Houston)

References in corpus (1)

• Ferromagnetic in-plane spin fluctuations in NaxCoO2 observed by neutron inelastic scattering

Cited by in corpus (6)

• Optical Spectroscopy in CoO: Phonons, Electric, and Magnetic Excitations
• Neutron scattering measurements of $dd$ and spin-orbit excitations below the Mott-Hubbard gap in CoO
• Ordered magnetism in the intrinsically decorated $j{}_{\mathrm{eff}}$ = $\frac{1}{2}$ $\alpha$-CoV${}_3$O${}_8$
• Magnetic Fluctuations and the Spin-Orbit Interaction in Mott Insulating CoO
• Magnetic excitations of spin and orbital moments in cobalt oxide
• Coexistence of a triplet nodal order-parameter and a singlet order-parameter at the interfaces of ferromagnet-superconductor Co/CoO/In junctions