Electron spin resonance (ESR) in plastdoped polyanilines and AC conductivity and ESR in oxides.

• Grant number: 10/12790-8
• Support Opportunities: Scholarships in Brazil - Master
• Start date: March 01, 2011
• End date: February 28, 2013
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Lygia Christina de Moura Walmsley
• Grantee: Vinicius Tadeu Santana
• Host Institution: Instituto de Geociências e Ciências Exatas (IGCE). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
• Associated scholarship(s): 12/13971-1 - Investigation by EPR of defects in polycrystalline samples of BiMn2O5, BE.EP.MS

Abstract

The transition metal oxides have been intensively studied in the last decade, not only for their potential technological applications but by the challenge physics. Several of them crystallize in the double perovskite structure. The structural, electronic and magnetic properties are interconnected. The a.c. conductivity in the double perovskites Ca2-xLaxFeIrO6 e Sr2-xLaxFeIrO6 can give information about electric and magnetic properties in these strongly correlated systems.The similarities of the magnetic properties of dimer spin 1/2 systems and polyanilines doped with plasticizers have been recently demonstrated. The spin 1//2 dimers have been shown to model a Bose Einstein Condensation (BEC) for some conditions of the exchange interaction. Using Electron Spin Resonance (ESR) the study of the exchange interaction will be done and the conditions favouring a BEC will be discussed.

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

SANTANA, Vinicius Tadeu. Medidas de ressonância de spin eletrônico (RSE) em polianilina dopada com plastificante e de condutividade a.c. e RSE em óxidos. 2013. Master's Dissertation - Universidade Estadual Paulista (Unesp). Instituto de Geociências e Ciências Exatas. Rio Claro Rio Claro.