Development of (Bi<sub>0.5</sub><i>L</i><sub>0.5</sub>)(Fe<sub>0.7</sub>Co<sub>0.3</sub>)O<sub>3</sub> (<i>L</i>=La, Nd, Sm, Gd, Dy) Thin Films with Excellent Magnetic Properties for Magnetic Device Application

(Bi0.5L0.5)(Fe0.7Co0.3)O3 (L = La, Nd, Sm, Gd, Dy) thin films with ferromagnetism and ferroelectricity were fabricated using pulsed DC sputtering technique to obtain high saturation magnetization, perpendicular magnetic anisotropy large Kerr effect. These properties are very important for realization of performance devices driven by electric field. All had relatively Especially, (Bi0.5Nd0.5)(Fe0.7Co0.3)O3 film a magnetization 140 emu/cm3 (1.40×105 A/m), 2.6 at ratio coercivity against in-plane (Bi0.5La0.5)(Fe0.7Co0.3)O3 rotation angle 0.72°. excellent compared the case (Bi0.5A0.5)FeO3 (A Ca, Sr, Ba) maximum value 90 (9.0×104 A/m) (for magnetization), 0.8 Perpendicular coercivity) 0.03° angle) which previously.