| 초록 |
Magnetoelectric (ME) effect is defined as an electric polarization in response to an applied magnetic field or vice versa. ME responses can be obtained by applying two required magnetic bias of Hdc and Hac. Therefore, the existence of external magnetic field (Hdc) provides a critical limitation to be used in potential applications. In recent, several research groups have reported self-bias ME responses, which were defined as a remnant ME voltage at Hdc = 0 Oe. They illustrated that the ME hysteretic responses are originally dependent on magnetostriction shift induced by bi-magnetic interactions from two different magnetic susceptibilities. So far, the self-bias ME responses have been only scrutinized in heterogeneous phase structures although it is very considerable to figure out strain transfer effect between two magnets on self-bias ME effect. In this study, we have investigated phase structural effect (homogeneous and heterogeneous) on bi-magnetic interactions for tunable self-bias ME responses. Homogeneous ME composites structures were prepared by complexation of one-phase piezoelectric material (BaTiO3) and one-phase bi-magnetic clusters (ZnFe2O4/NiFe2O4). |
