Influence of Oxygen Level on Structure and Ferromagnetism in Sn_0.95Fe_0.05O₂ Nanoparticles

Authors

Aaron Thurber, Boise State UniversityFollow
K. M. Reddy, Boise State University
Alex Punnoose, Boise State UniversityFollow

Document Type

Article

Publication Date

4-1-2009

Abstract

This report discusses the effect of oxygen concentration at atmospheric pressure on the structural composition and ferromagnetism of nanoparticles of Fe doped SnO₂. Sn_0.95Fe_0.05O₂ was annealed under controlled atmospheres with gradually increasing oxygen concentrations (varying O₂ from 0 to 10⁶ ppm in N₂). Prominent mass changes due to oxygen loss take place in the 0–5000 ppm range and the ferromagnetic properties. Ferromagnetism of Sn_0.95Fe_0.05O₂ is inversely related to the oxygen concentration, which confirms the important role of oxygen vacancies this system. X-ray diffraction, thermogravimetric analysis, transmission electron microscopy, and magnetometry studies confirm that the observed changes in the ferromagnetic properties are due to changes in the oxygen stoichiometry.

Publication Information

Thurber, Aaron; Reddy, K. M.; and Punnoose, Alex. (2009). "Influence of Oxygen Level on Structure and Ferromagnetism in Sn_0.95Fe_0.05O₂ Nanoparticles". Journal of Applied Physics, 105(7), 07E706-1 - 07E706-3. http://dx.doi.org/10.1063/1.3072723