ANISOTROPY OF G-FACTOR AND MAGNETIC-ANISOTROPY ENERGY OF ANTIFERROMAGNETIC CU-COMPOUND BI2CUO4

To study the anisotropy of g-factor of Cu2+ ion in the antiferromagnet ic Bi2CuO4 having an interesting crystal structure, we calculate the e nergy splitting of the orbital state of Cu2+ ion due to the electric c rystalline field arising from the surrounding O2-. Bi3+ and Cu2+ ions. On the basis of Pryce's spin Hamiltonian we evaluate g-tensor of each Cu2+ ion in the unit cell. We also study the magnetic anisotropy ener gy caused hy the dipole-dipole interaction and anisotropic exchange in teraction. The results are discussed in connection with observations.