Magnetic and Structural Characterization of IrO2 and Co : IrO2
Samples Synthesized via Pechini Method

Abstract: Diluted Magnetic Oxide Semiconductors (DMOS) are oxides that combine two important properties for applications in spintronics: the capacity to control conductivity and ferromagnetism. Obtaining new materials that exhibit simultaneously these behaviors is challenging. In this paper, we investigate whether it is possible to use IrO₂ and Co:IrO₂ as a DMOS by studying their magnetic and structural characteristics. The samples were synthesized by the Pechini method, and characterized by X-ray diffraction and magnetization measurements. These samples were doped with 0 to 10 mol% Co concentrations. The X-ray diffraction was analyzed using the Rietveld refinement procedure which showed that all cobalt (Co²⁺) introduced into the IrO₂ lattice replace Ir⁴⁺ ions until the dopants concentration of about 10 mol%, and no phase segregation was observed for the highest dopant concentration investigated. Magnetization measurements as a function of temperature and applied magnetic field were performed on these samples. The results show a paramagnetic behavior, despite of the high Co concentration.

Author(s): Von Dreifus, D.; de Oliveira, A. J. A.; do Rosario, A. V.; et al.

 Journal of Superconductivity and Novel Magnetism

Volume: 26 Issue: 6 Pages: 2319-2321 Published: 2013

DOI: http://dx.doi.org/10.1007/s10948-012-1424-5

PDF: Magnetic and Structural Characterization of IrO2 and Co – IrO2