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Spin anisotropy of the resonance in superconducting FeSe0.5Te0.5

(2010)

Authors:

P Babkevich, B Roessli, SN Gvasaliya, L-P Regnault, PG Freeman, E Pomjakushina, K Conder, AT Boothroyd
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The first 21 years of reverse Monte Carlo modelling—a workshop held in Budapest, Hungary (1–3 October 2009)

Journal of Physics Condensed Matter IOP Publishing 22:40 (2010) 400301

Authors:

David A Keen, László Pusztai
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The hydrogen-bonding transition and isotope-dependent negative thermal expansion in H3Co(CN)6

Journal of Physics Condensed Matter IOP Publishing 22:40 (2010) 404202

Authors:

David A Keen, Martin T Dove, John SO Evans, Andrew L Goodwin, Lars Peters, Matthew G Tucker
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Tuning the superconducting and magnetic properties in Fe_ySe_0.25Te_0.75 by varying the Fe-content

(2010)

Authors:

M Bendele, P Babkevich, S Katrych, SN Gvasaliya, E Pomjakushina, K Conder, B Roessli, AT Boothroyd, R Khasanov, H Keller
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Ferromagnetic excitations in La0.82Sr0.18CoO 3 observed using neutron inelastic scattering

Physical Review B - Condensed Matter and Materials Physics 82:14 (2010)

Authors:

RA Ewings, PG Freeman, M Enderle, J Kulda, D Prabhakaran, AT Boothroyd

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.
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