Litvinov, Dmitri2023-01-16May 20222022-05-12Portions of this document appear in: Safi Samghabadi, Farnaz, Long Chang, Mohammad Khodadadi, Karen S. Martirosyan, and Dmitri Litvinov. "Scalable, cost-efficient synthesis and properties optimization of magnetoelectric cobalt ferrite/barium titanate composites." APL Materials 9, no. 2 (2021): 021104.https://hdl.handle.net/10657/13344Magnetoelectric (ME) effect has a number of promising applications in sensors, energy harvesting, antennas, drug delivery, etc. In ME materials the electric polarization can be controlled by varying the material’s magnetization state and, conversely, varying the electric polarization affects the material’s magnetization state. The ME effect has been observed in a few single-phase multiferroic materials; however, the effect is relatively weak at room temperature, which hampers useful applications. More robust ME behavior has been achieved in composites that combine mechanical coupled magnetostrictive and piezoelectric materials arranged in a matrix. These composites can be produced in versatile connectivity configurations/matrices with a wide choice of materials, volume fraction, and microstructure and can exhibit several orders of magnitude stronger ME effect than single-phase ME materials. In this work, the development and characterization of two different types of multi- phase ME materials, nanocomposites, and thin-film laminates are investigated. Mag- netoelectric composites of CoFe2O4-BaTiO3 are synthesized using commercially avail- able CoFe2O4 and BaTiO3 precursors with employing the inexpensive and scalable process based on ball-milling and high-temperature sintering/annealing for drug de- livery applications. ME thin film laminates of AlN and FeGaZr also are developed and utilized as the building block for fabrication of a suspended ME sensor for integration into a magnetic field sensor.application/pdfengThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. UH Libraries has secured permission to reproduce any and all previously published materials contained in the work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).MagnetoelectricsCompositesThin-film laminatesMicrofabricationBiosensor2023-01-16Thesisborn digital