INFLUENCE OF DIFFERENT MAGNETIC PHASES ON MAGNETOELECTRIC COUPLING IN LEAD-FREE NANO HETEROSTRUCTURES

• Grant number: 24/04150-1
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• Start date: September 01, 2024
• End date: June 30, 2028
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: José Antonio Eiras
• Grantee: Rodrigo Ambrosio Rodrigues de Carvalho
• Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
• Associated research grant: 17/13769-1 - Multiferroic and ferroelectric materials for energy converters: synthesis, properties, phenomenology and applications, AP.TEM

Abstract

Contemporary technological advancement, increasingly focused on artificial intelligence and machine learning, demands efficient solutions for storing and processing data. The industry seeks devices with high logical density, low energy consumption, no volatility and fast access speeds. Furthermore, it is crucial to consider environmentally friendly materials to promote technological advancement in line with environmental policies, boosting innovationtowards a greener and more conscious society. Magnetoelectric multiferroic materials have re-emerged as a relevant field, offering the ability to switch between states ferroelectric/ ferromagnetic fields with magnetic/electric fields and promoting the development of high-performance and energy-efficient memories. To overcome challenges, artificial multiferroic composites, which combine ferroelectric and magnetic materials, were developed to achieve more robust coupling than single-phase materialstraditional. These advances represent a promising approach to driving the next generation of multifunctional technological devices. In view of the current needs in thisfield, the proposed research aims to investigate the effects of different magnetic phases onlead-free multiferroic nanostructures of the type (BaTiO3 and/or (K,Na)NbO3)/(CoFe2O4, NiFe2O4 and/or BaFe12O19), with emphasis on interfaces, aiming to optimize couplings magnetoelectrics. Goals include fabrication of nanoheterostructures, investigation of parameters control system for ferroelectric/ferromagnetic switching, study of the properties of coupling, phenomenological interpretation for application in multifunctional devices and sensing. This proposal is the continuation of the ongoing direct doctoral project FAPESP (#2023/07654-8), linked to the FAPESP thematic project (#2017/13769-1) that will finalize in August 2024. The project aims to deepen the understanding and phenomenology of phenomena physicists involved in magnetoelectric coupling in nano-heterostructures and driving theinnovation in lead-free nanoscale magnetoelectric devices and drive the innovation in lead-free nanoscale magnetoelectric devices.