Microscopic Hamiltonian of Cu₂OSEO3

This lecture discusses the microscopic Hamiltonian of Cu₂OSEO3, focusing on the model system FeGe and the various components of the total Hamiltonian. It explores the anisotropic exchange interaction in FeGe, revealing the signature through vector-field control. The lecture also covers the sample preparation and transmission geometry for T-REXS experiments on Cu₂OSEO3, analyzing the results after saturation at different temperatures and magnetic fields. The anisotropic periodicity of the conical texture in Cu₂OSEO3 is highlighted, showing the minimum and maximum Q values for different crystallographic directions. Theoretical calculations by Oleg Utesov are presented, comparing the findings for FeGe and Cu₂OSEO3.