Publication Date:
2015-04-23
Description:
To realize multiferroic and magnetoelectric properties, bi-layered nanocomposite films consisting of CoFe 2 O 4 (CFO)/Pb 1−x Sr x TiO 3 (PST) phases (x = 0.1, 0.2, and 0.3) have been deposited on Pt/TiO 2 /SiO 2 /Si substrate by using a metallo-organic decomposition process. Both the PST perovskite and the CFO spinel phases are confirmed from X-ray diffraction patterns and Raman spectra of the composite films. The composite films exhibit room temperature multiferroic properties. The values of saturation magnetization ( M s ), remanent magnetization ( M r ), and coercive field ( H c ) of the composite films are in the range of 108–119 kA/m, 42–51 kA/m, and 44.5–64.1 kA/m, respectively. In addition, the saturation polarization ( P s ), remanent polarization ( P r ), and electrical coercive field ( E c ) are observed in the range of 11.3–14.4 μ C/cm 2 , 2.9–4.8 μ C/cm 2 , and 56–59.5 kV/cm, respectively. The dielectric response in the presence of applied magnetic field, H dc ∼ 238.6 kA/m shows a high magnetocapacitance value ∼385% at frequency 100 kHz for CFO/PST composite film with x = 0.1. The maximum magnetoelectric voltage co-efficient value, α E ∼ 380 kV/(m × T) has been achieved in the composite films with x = 0.1. The influence of elastic/and or interfacial strain on multiferroic magnetoelectric properties is evident from the results.
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics
