|About this Abstract
||Materials Science & Technology 2011
||MS&T'11 Poster Session
||076 Ferroic and Structural Investigations in Rare Earth Modified TbMnO3 Ceramics
||Ivair Aparecido dos Santos, Gustavo S. Dias, Ricardo A. M. Gotardo, Luiz F. Cótica, Ducinei Garcia, José A. Eiras, Adelino A. Coelho
|On-Site Speaker (Planned)
||Ivair Aparecido dos Santos
Multiferroics have been widely studied because they exhibit simultaneously ferroelectricity, ferromagnetism and/or ferroelasticity and have promising technological application as solid state transformers, memories, sensors, and spintronic devices. The recent observation of large magnetoelectric and magnetocapacitive effects in TbMnO3 provides a novel approach to the mutual control of magnetization and electric polarization in magnetic ferroelectrics. The Mn moments in TbMnO3 undergo antiferromagnetic (AF) transition at 41 K with a sinusoidal ordering of the Mn3+ moments. The wave vector of the magnetic modulation is incommensurate at the AF transition and becomes locked-in below 28 K, where TbMnO3 becomes a ferroelectric material where polarization can be switched by magnetic field. In this work, polycrystalline TbMnO3 samples doped with rare-earth ions were processed by high-energy ball milling. Single-phased and denser samples were obtained and its structure, electrical and magnetic properties were carefully investigated, focusing the ion substitution effects on the ferroic response.