Concentration dependence of magnetic moment in Ce 1-xFe xO 2

Geoffrey L. Beausoleil; Aaron Thurber; S. S. Rao; Gordon Alanko; C. B. Hanna; Alexander Punnoose

doi:10.1063/1.3688933

Concentration dependence of magnetic moment in Ce _1-xFe _xO ₂

Geoffrey L. Beausoleil
, Aaron Thurber
, S. S. Rao
, Gordon Alanko
, C. B. Hanna
, Alexander Punnoose

Physics Department

Boise State University

Research output: Contribution to journal › Article › peer-review

12 Scopus citations

Abstract

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.

Original language	English
Article number	07B546
Journal	Journal of Applied Physics
Volume	111
Issue number	7
DOIs	https://doi.org/10.1063/1.3688933
State	Published - 1 Apr 2012

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abstract = "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.",

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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, Alexander

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.

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VL - 111

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ER -

Concentration dependence of magnetic moment in Ce _1-xFe _xO ₂

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