Disorder in the stacking of vacant sites in the crystal structure was studied. The compositional dependences of the order-disorder transition temperature, and the activation energy for hopping conductivity, were analyzed while taking account of atoms which were in sites that were vacant in the completely ordered state.

R.Laiho, A.V.Lashkul, K.G.Lisunov, V.N.Stamov, E.Lahderanta, V.S.Zahvalinski: Journal of Magnetism and Magnetic Materials, 1995, 140-144[3], 2019-20