Figure 4
The two different scattering geometries for magnetic field dependent SANS. (a) H ki geometry: the long rod axes are aligned parallel to the incident neutron beam and perpendicular to the applied magnetic field H. (b) H ki geometry: the long rod axes are aligned parallel to the incident neutron beam and parallel to the applied magnetic field H. With reference to equations (1 ) and (2 ) we emphasize that in both geometries the applied-field direction defines the direction of a Cartesian laboratory coordinate system and that denotes the respective longitudinal magnetization Fourier coefficient, while and are the respective transverse components, varying in the ex ey plane. The angle θ specifies the orientation of the scattering vector on the two-dimensional detector; it is measured between and (0,qy,qz) (a) and between and (b). |