Abstract
The films of Bi0.5Na0.5Ti1-xFexO3-δ and NiFe2-xNdxO4 were deposited via spin-coating method. The results indicate that the film of Bi0.5Na0.5Ti0.98Fe0.02O3-δ possesses good ferroelectric performance with remnant polarization as high as 25.2 µC·cm−2 and the film of NiFe1.98Nd0.02O4 possesses a maximal saturation magnetization (282.4 emu·cm−3). The composite films of Bi0.5Na0.5Ti0.98Fe0.02O3-δ-NiFe1.98Nd0.02O4 with different deposition sequences were also prepared. In contrast to single-phase films, magnetoelectric composite films exhibit smaller remnant polarization and saturation magnetization. The film of NiFe1.98Nd0.02O4/Bi0.5Na0.5Ti0.98Fe0.02O3-δ (NB) possesses greater values of remnant polarization, saturation magnetization and magnetoelectric coupling coefficient than those for the composite film of Bi0.5Na0.5Ti0.98Fe0.02O3-δ/NiFe1.98Nd0.02O4 (BN). The composite film of BN exhibits greater magnetoelectric coupling coefficients as high as 169.7 mV·cm−1·Oe−1.
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