Sputter-prepared (001) BiFeO(3) thin films with ferromagnetic L1(0)-FePt(001) electrode on glass substrates

Highly textured BiFeO(3)(001) films were formed on L1(0)-FePt(001) bottom electrodes on glass substrates by sputtering at reduced temperature of 400°C. Good electric polarization 2P(r) = 80 and 95 μC/cm(2), comparable to that of the reported epitaxial films, and coercivity E(c) = 415 and 435 kV/cm are achieved in the samples with 20-nm- and 30-nm-thick electrodes. The BiFeO(3)(001) films show different degrees of compressive strain. The relation between the variations of strain and 2P(r) suggests that the enhancement of 2P(r) resulted from the strain-induced rotation of spontaneous polarization. The presented results open possibilities for the applications based on electric-magnetic interactions.