Study on the multiferroic properties of 2-2 type of BiFeO3-CuFe2O4 thin films

Resistive Switching and the Local Electric Field in Bi0.85-xPr0.15RExFe0.97Mn0.03O3/CuFe2O4 (RE = Sr, Dy) Bilayered Thin Films

“…When the frequency gets close to 1 MHz, the loss values tend to be increased. Those features are different from those of the single layer BFO thin films that have been reported. , Compared with the frequency spectra of the dielectric constants, the frequency of the loss peaks is consistent with that of the drastically decreased dielectric constant. This phenomenon observed in the report about Bi 0.8 La 0.2 FeO 3 /CoFe 2 O 4 bilayered thin films is a kind of dielectric relaxation and can be classified as Wagner–Maxwell dielectric relaxation .…”

“…The coercive field ( H c ) are 610 Oe, 634 Oe, 754 Oe, and 725 Oe. On the basis of our previous works, ,, both the BFO and the ion-doped BFO thin films possess weak ferromagnetism. It means that the ferromagnetic properties of the bilayered thin films improved by comparison with BFO.…”

“…The polarization of paraelectric phase CuFO is unable to switch under the applied field . And the interface polarization coupling between the nonswitchable polarization of CuFO phase and the switchable polarization of BFO phase exists in the bilayered thin films.…”

“…Some studies − about the combinations of the ion substitutions and formation of heterostructure to improve the ferroelectricity and ferromagnetism simultaneously have been reported. CuFe 2 O 4 (CuFO) is one of lead-free semiconductor materials with favorable magnetism, which has been studied in the photocatalysis. − Few studies are available on thin films, , especially for the multiferroic thin films. Multiferroic properties of bilayer thin films of ion-doped BFO/CuFO thin films are rarely reported.…”

“…CuFe 2 O 4 (CuFO) is one of lead-free semiconductor materials with favorable magnetism, which has been studied in the photocatalysis. 25−27 Few studies are available on thin films, 28,29 especially for the multiferroic thin films. Multiferroic properties of bilayer thin films of ion-doped BFO/CuFO thin films are rarely reported.…”