This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful. More information in our Privacy Policy
Multiferroic materials
Piezoelectric and magnetic composites with different architecture
Principal investigators: Elisa Mercadelli
Involved personnel: Claudio Capiani, Carmen Galassi, Carlo Baldisserri, Pietro Galizia
Among the multifunctional materials, which combine different properties in the same structure, multiferroic materials are of considerable and growing interest. They are mono- or bi-phasic materials in which magnetization can be induced by an electric field and an electrical polarization can be induced by a magnetic field.
Potential applications of current interest range from sensors to spintronic applications as information storage and processing technology. The combination of ferroelectric and ferromagnetic properties and the engineering of multiferroic materials let to develop a new generation of electronic devices, such as microprocessors, non-volatile memories, field effect transistors, faster than current components and with reduced energy consumption.
The activity at CNR-ISTEC is currently focused on processes for the development of new materials and especially the production of composites coupling a magnetic material with a dielectric or ferroelectric one.
The coexistence of the magnetic and electrical subsystems has a multiplier effect on the final properties of the composite, which are not present in the individual phases, and offer an additional degree of freedom in the design of the devices.
Once the process parameters for the production of individual materials are optimized, the suitable magnetic materials such as Co, Mn, Ba based ferrites are coupled to the dielectric / ferroelectric material with different architectures (in the form of bulk materials or thick films). The multifunctional materials developed are produced with “near net-shape” geometries to be assembled in the devices.
A miniaturized structure was produced in which a thin piezoelectric layer is coupled to a magnetic head.
Equipment and processes
The study focuses on the synthesis of powders with designed milling, heat treatments and processing in order to obtain single-phase materials or laminated or particulate composites.
Main partners
- Politecnico di Torino
- University “Alexandru Ioan Cuza” din Iasi
- Istituto dei Sistemi Complessi (CNR-ISC)
- Departamento de Materiales Ferroeléctricos (ICMM – CSIC)
Projects
Publications
- P. Galizia, M. Cernea, V. Mihalache, L. Diamandescu, G. Maizza, C. Galassi, Easy batch-scale production of cobalt ferrite nanopowders by two-step milling: structural and magnetic characterization, Materials and Design 130 (2017) 327–335
- P. Galizia, C. E Ciomaga, L. Mitoseriu, C. Galassi, PZT-cobalt ferrite particulate composites: densification and lead losses control by quite-fast sintering, J Eur Ceram Soc 37 (2017) 161–168.
- F. Craciun, M.Cernea, V. Fruth, M. Zaharescu, I. Atkinson, N. Stanica, L. Tanase, L. Diamandescu, A. Iuga, C. Galassi, Novel Multiferroic (Pb1-3x/2Ndx)(Ti0.98-yFeyMn0.02)O3 Ceramics with Coexisting Ferroelectricity and Ferromagnetism at Ambient Temperature, Materials and Design 110, (2016), 693–704
- P. Galizia, D. Gardini, S. Ortelli, C. Capiani, M. Anbinderis, R. Grigalaitis, G. Maizza, C. Galassi, Novel magnetodielectric cobalt ferrite – titania – silica ceramic composites for high frequencies applications, Ceramics International 42 (2016) 16650–16654
- P. Galizia, C. Baldisserri, C. Capiani, C. Galassi Multiple parallel twinning overgrowth in nanostructured dense cobalt ferrite, Materials and Design 109 (2016) 19–26
- M. Cernea, P. Galizia, I. V. Ciuchi; G. Aldica, V. Mihalache, L. Diamandescu, C. Galassi, CoFe2O4 magnetic ceramic derived from gel and densified by spark plasma sintering, Journal of Alloys and Compounds 656 (2016) 854-862
- P. Galizia; I. V Ciuchi; D. Gardini; C. Baldisserri; C. Galassi, Bilayer film based on composite CoFe2O4/TiO2 and niobium-doped PZT by electrophoretic Deposition, J. Eur. Ceram. Soc. 36, 2, (2016), 373–380
- P. Galizia, C. Baldisserri, C. Galassi, Microstructure development in novel titania-cobalt ferrite ceramic materials, Ceramics International 42 (2016) 2634–2641 (Available online 20 October 2015
- M. Cernea, R. F. Negrea, I. V. Ciuchi, C. Baldisserri, R. Trusca, C. Galassi, Dielectric characterization of BaxSr1-xFe12O19 (x=0.05-0.35) ceramics, Ceramics International 42 (2016), pp. 1050-1056. DOI information: 10.1016/j.ceramint.2015.09.029.