Tensorial piezomagnetic coefficients for single-domain titanomagnetite crystals at saturation magnetization

The piezomagnetic and magnetostrictive behaviour of titanomagnetite single-domain crystals is described in a general tensorial formalism with respect to a reference initial configuration in which crystals possess a saturation remanence magnetization and are subjected to a prestress field. The equivalence between the present linearized theory and previous semi-empirical formulae is proved. Numerical values are given for the piezomagnetic coefficients in terms of the magnetostrictive constants Δ100 and Δ111 which have been experimentally determined for titanomagnetite single crystals.