Anisotropy of g-factor and Magnetic Anisotropy Energy of Antiferromagnetic Li2CuO2

To study the anisotropy of g-factor of Cu²⁺ ion in the antiferromagnetic Li₂CuO₂ which has an interesting crystal structure, we calculate the crystalline electric field at Cu site arising from the neighboring oxygen, Cu, Li ions and determine the orbital level splitting. On the basis of Pryce’s spin Hamiltonian we evaluate g-factor of Cu²⁺ ion. We also study the magnetic anisotropy energy caused by the magnetic dipole-dipole interaction and the anisotropic exchange interaction. The results are discussed in connection with observations.