TY - JOUR
T1 - Concentration dependence of magnetic moment in Ce 1-xFe xO 2
AU - Beausoleil, Geoffrey L.
AU - Thurber, Aaron
AU - Rao, S. S.
AU - Alanko, Gordon
AU - Hanna, C. B.
AU - Punnoose, Alex
PY - 2012/4/1
Y1 - 2012/4/1
N2 - In this study, we examined the impact of iron doping on the structural, chemical, and magnetic properties of ceria (Ce 1-xFe xO 2). Samples were produced in triplicate through a coprecipitation approach in a forced hydrolysis synthesis that yielded consistently sized nanocrystals using three different cerium precursors: cerium chloride, cerium ammonium nitrate, and cerium nitrate. Particles were characterized by x ray diffraction (XRD), x ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), electron paramagnetic resonance (EPR) spectroscopy, and vibrating sample magnetometry (VSM). XPS and EPR data shows iron to be in the Fe 3+ state and confirms the nominal dopant concentration. The moment per Fe ion found was largest at the lowest dopant concentrations, and quickly decreased as the concentration was increased. We used XPS to estimate the Ce 3+Ce 4+ ratio and observed a linear relation between the saturation magnetization and the Ce 3+Ce 4+ ratio.
AB - In this study, we examined the impact of iron doping on the structural, chemical, and magnetic properties of ceria (Ce 1-xFe xO 2). Samples were produced in triplicate through a coprecipitation approach in a forced hydrolysis synthesis that yielded consistently sized nanocrystals using three different cerium precursors: cerium chloride, cerium ammonium nitrate, and cerium nitrate. Particles were characterized by x ray diffraction (XRD), x ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), electron paramagnetic resonance (EPR) spectroscopy, and vibrating sample magnetometry (VSM). XPS and EPR data shows iron to be in the Fe 3+ state and confirms the nominal dopant concentration. The moment per Fe ion found was largest at the lowest dopant concentrations, and quickly decreased as the concentration was increased. We used XPS to estimate the Ce 3+Ce 4+ ratio and observed a linear relation between the saturation magnetization and the Ce 3+Ce 4+ ratio.
UR - http://www.scopus.com/inward/record.url?scp=84861737798&partnerID=8YFLogxK
U2 - 10.1063/1.3688933
DO - 10.1063/1.3688933
M3 - Article
AN - SCOPUS:84861737798
SN - 0021-8979
VL - 111
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 7
M1 - 07B546
ER -