Magnetic Form Factor of Cu²⁺ in K₂CuF₄

Abstract

Magnetic form factor of Cu 2+ in the ferromagnet K 2 CuF 4 has been measured by means of the polarized neutron diffraction technique. The observed form factor is in good agreement with the calculated one based on the orbital ordered wave functions in the tetragonal crystalline field. In the calculation the effects of covalency and of spin-orbit interaction are taken into account.