The improved saturation magnetization (Ms) of the CFO/PZT thin films has been observed and the enhancement increases with increasing PZT layer thickness. Both magnetic CFO and ferroelectric PZT phases were successfully retained in the heterostructured thin film. These heterostructured thin films were fabricated via a combined route of spin coating and rf sputtering. These results help to further understand the role of strain and interface effects in the magnetic and transport properties of manganite based multiferroic systems.įour CoFe 2 O 4/ Pb ( Zr 0.52 Ti 0.48) O 3 (CFO/PZT) bilayered thin films with increasing PZT constituent layer thicknesses have been fabricated in order to investigate the optimized PZT layer thickness and the thickness effect on the magnetic and ferroelectric behaviors of the heterolayered multiferroic thin films. Structural defects have a stronger influence on the magnetic properties than on the transport properties, reducing the ferromagnetic transition temperature while increasing the magnetic hardness of the superlattices. Tensile strain reduces the charge carrier localization, increasing the ferromagnetic transition temperature. Compressive strain tends to increase the competition between the magnetic interactions decreasing the ferromagnetism of the samples and the localization of the charge carrier through the electron-phonon interaction. The results show that both strain and structural disorder can significantly affect the physical properties of the systems. The magnetic and electronic properties were investigated by SQUID magnetometry and resistance measurements. The crystalline structure was characterized by X-Ray diffraction and transmission electron microscopy. We systematically modified the thickness of the ferromagnetic layer to analyze dimensional and structural effects on the superlattices with different structural characteristics. DC sputtering was used to grow ferromagnetic (La$_$TiO$_3$ or BaTiO$_3$) superlattices. Artificially engineered superlattices were designed and fabricated to induce different growth mechanisms and structural characteristics.
0 kommentar(er)
