Integração das técnicas tape casting e magnetron sputtering para o desenvolvimento de sistemas multifuncionais moldáveis

Abstract

The increasing demand for low-power and high-performance electronic systems have been driving the discovery of new materials and the study of their physical and chemical properties. In this sense, the integration of diferent techniques allows us to develop multifunctional materials with specific properties and characteristics for certain technological applications. Therefore, this work presents a proposal for the production of hybrid materials through the integration between the tape casting and magnetron sputtering techniques. The magnetron sputtering technique was used to deposit trilayered thin films nanostrutures of Ni81Fe19/Cr/Ni81Fe19, using as substrate Al2O3 and ZrO2 ceramic flexible sheet produced by tape casting technique. As a comparison standard, similar films were deposited on the amorphous rigid substrate (glass), which has properties well explored in the literature. The suspensions of ceramic materials presented a pseudoplastic behavior, which is recommended for tape casting technique, and then verified through the viscosity test. The produced films presents thickness of 300 nm, where varying the thickness of the Ni81Fe19 layers between 75 and 142.5 nm and the Cr layer thickness between 15 and 150 nm. The structural characterization revealed that the change of substrate used in the films did not alter the structural characteristics of Ni81Fe19. The magnetic characterization reveals an evolution of the contribution of out-of-plane anisotropy with the increase of Ni81Fe19 layer thickness, as well the dependence of magnetic properties with the Ni81Fe19 layer thickness on flexible substrates similar to that observed on films grown onto glass substrate. Our results show that the flexible sheets retain the characteristics of Ni81Fe19, adding magnetic properties to the Al2O3 and ZrO2 ceramic tapes, thus making these flexible sheets excellent candidates for moldable device applications as ceramic-magnetic coating. The increasing demand for low-power and high-performance electronic systems have been driving the discovery of new materials and the study of their physical and chemical properties. In this sense, the integration of diferent techniques allows us to develop multifunctional materials with specific properties and characteristics for certain technological applications. Therefore, this work presents a proposal for the production of hybrid materials through the integration between the tape casting and magnetron sputtering techniques. The magnetron sputtering technique was used to deposit trilayered thin films nanostrutures of Ni81Fe19/Cr/Ni81Fe19, using as substrate Al2O3 and ZrO2 ceramic flexible sheet produced by tape casting technique. As a comparison standard, similar films were deposited on the amorphous rigid substrate (glass), which has properties well explored in the literature. The suspensions of ceramic materials presented a pseudoplastic behavior, which is recommended for tape casting technique, and then verified through the viscosity test. The produced films presents thickness of 300 nm, where varying the thickness of the Ni81Fe19 layers between 75 and 142.5 nm and the Cr layer thickness between 15 and 150 nm. The structural characterization revealed that the change of substrate used in the films did not alter the structural characteristics of Ni81Fe19. The magnetic characterization reveals an evolution of the contribution of out-of-plane anisotropy with the increase of Ni81Fe19 layer thickness, as well the dependence of magnetic properties with the Ni81Fe19 layer thickness on flexible substrates similar to that observed on films grown onto glass substrate.Our results show that the flexible sheets retain the characteristics of Ni81Fe19, adding magnetic properties to the Al2O3 and ZrO2 ceramic tapes, thus making these flexible sheets excellent candidates for moldable device applications as ceramic-magnetic coating.