Flux-line lattice in uniaxial superconductors at low magnetic inductions

Within the London approximation, we predict the geometry of the flux lattice in anisotropic, strongly type-II superconductors for arbitrary field orientation and intensity. At low magnetic fields, the scaling of the lattice parameters with field differs markedly from the ordinary B-1/2 dependence. We also calculate the form factors and reflectivities for neutron diffraction. The dependence of the reflectivity on the angle between the magnetic field and the c axis, and on the field intensity, is calculated.