Itinerant Spin Excitations in SrFe2As2 Measured by Inelastic Neutron Scattering
(2010)
Spin anisotropy of the resonance in superconducting FeSe0.5Te0.5
(2010)
Tuning the superconducting and magnetic properties in Fe_ySe_0.25Te_0.75 by varying the Fe-content
(2010)
Ferromagnetic excitations in La0.82 Sr0.18 CoO 3 observed using neutron inelastic scattering
Physical Review B - Condensed Matter and Materials Physics 82:14 (2010)
Abstract:
Polarized neutron inelastic scattering has been used to measure spin excitations in ferromagnetic La0.82Sr0.18CoO3. The magnon spectrum of these spin excitations is well defined at low energies but becomes heavily damped at higher energies and can be modeled using a quadratic dispersion. We determined a spin wave stiffness constant of D=94±3 meV Å2. Assuming a nearest-neighbor Heisenberg model we find reasonable agreement between the exchange determined from D and the bulk Curie temperature. Several possible mechanisms to account for the observed spin-wave damping are discussed. © 2010 The American Physical Society.Magnetic spectrum of the two-dimensional antiferromagnet La2CoO4 studied by inelastic neutron scattering
(2010)