Improved ferroelectric,dielectric and magnetic properties with La- and Mn- doped Bi5Ti3FeO15 thin films |
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Affiliation: | 1. Department of Microelectronics, Shanghai Jianqiao University, Shanghai, 201306, PR China;2. Shanghai Minhang High School, Shanghai, 200240, PR China |
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Abstract: | A series of La and Mn co-doped Bi5Ti3FeO15 (BLTFMO) thin films were prepared by spin-coating deposition route. X-ray diffraction, atomic force microscopy and scanning electron microscopy were used to characterize the structures of these BLTFMO thin films. Ferromagnetic properties are obtained as the La-doping content is 0, 0.1, 0.2, and 0.3 with the transition temperature of 127.2 K, 65.1 K, 48.1 K, and 7.9 K, respectively. Well-defined ferroelectric loops are found in all these BLTFMO films, and a higher remnant polarization of 27.84, 24.21 and 24.02 μC/cm2 is obtained in the 0.1, 0.2 and 0.3 La-doped films, respectively. A weak dielectric dispersion for the BLTFMO without La-doping, a strong one in 0.1, 0.2, 0.3 and 0.4 La doped films as indicated by the appearance of a dielectric loss peak, and a weak dispersion in 0.6, 0.8 and 1 La doped ones are demonstrated. |
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Keywords: | Dielectric properties Ferroelectric properties Magnetic properties Multiferroic properties |
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