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Magnetic and electrical properties of multiferroic systems: single-phase and composites

Grant number: 13/27097-4
Support type:Scholarships in Brazil - Doctorate (Direct)
Effective date (Start): December 01, 2014
Effective date (End): January 29, 2019
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Adilson Jesus Aparecido de Oliveira
Grantee:Vinicius Pascotto Gastaldo
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Associated research grant:13/07296-2 - CDMF - Center for the Development of Functional Materials, AP.CEPID
Associated scholarship(s):15/21206-1 - Growth of thin films of quadruple multiferroic perovskite and investigation of the electron-phonon coupling using thermal and optics measurements, BE.EP.DD

Abstract

The study of magnetic materials applied for the processing and storage of information has increased in recent decades. One the milestone that arises in developing for a unique material with these two features. In this sense, has intensified research in multiferroic materials that combine both ferromagnetic and ferroelectric properties, and as a consequence, exhibit magnetoelectric effect. The challenge is trying to understand the fundamental properties that take this effect both in single-phase materials such as composites. This project direct doctorate aims to study and single-phase multiferroic composites to understand the mechanisms of coupling between ferroelectric and ferromagnetic phases. In the case of composite materials such coupling is extrinsic, ie., the strain of the ferromagnetic phase induces a mechanical strain in the ferroelectric phase . In single-phase materials the coupling occurs via the charge ordering due to magnetization of the spin network. Thus, a comparative study of this two classes of materials may open an interesting way to understand the mechanisms involved in these phenomena different materials perspective. (AU)