Neutron investigation of the Spin System Dynamics in α‐Cr<sub>2</sub>O<sub>3</sub>
R. A. AlikhanovInstitute of High Pressure Physics, MoscowŽ. DimitrijevićAneta Aniela KowalskaInstitute of Physics of the Jagiellonian University, CracowS. KraśnickiInstitute of Nuclear Physics, CracowH. RżanyInstitute of Nuclear Physics, CracowJelena TodorovićA. WanicInstitute of Nuclear Physics, Cracow
ABI
Abstract
Abstract Inelastic magnon scattering of neutrons (λ = 1.124 Å) on a single crystal of Cr 2 O 3 at a temperature of 85 °K is investigated by the neutron diffraction technique. The magnon dispersion relation is measured along several tracks in the reciprocal space. A calculated dispersion relation, including four different exchange integrals J i , is fitted to the experimental results. A good fit is obtained for: J 1 = −0.2 meV, J 2 = −0.5 meV, J 3 = −3.3 meV, and J 4 = −7.4 meV.