Crystal chemistry and magnetic properties of Eu2TiO4 and Eu3Ti2O7

The materials Eu2TiO4 and Eu3Ti2O7 have been found to be ferromagnets with Curie temperatures of about 9°K and 8.5°K respectively. An attempt was made to understand their magnetic properties by considering the crystal chemical relationships which exist among the compounds EuO, EuTiO3, Eu2TiO4 and Eu3Ti2O7 and the implications of this crystal chemistry for the magnetic interactions.