Structural and magnetic properties of Ni doped CeO2 nanoparticles

TL;DR

This study demonstrates room temperature ferromagnetism in Ni-doped CeO2 nanoparticles, showing that Ni ions substitute Ce ions and influence magnetic properties, with potential implications for spintronic applications.

Contribution

It provides experimental evidence of ferromagnetism in Ni-doped CeO2 nanoparticles and details the structural and magnetic changes due to Ni doping.

Findings

Ferromagnetism observed at room temperature in Ni-doped CeO2 nanoparticles.

Magnetic moment increases with Ni doping up to 7%, then decreases.

Lattice parameters and particle size decrease with increased Ni doping.

Abstract

We report room temperature ferromagnetism in Ni doped CeO2 nanoparticles using X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), and dc magnetization measurements. Nanoparticles of Ce1-xNixO2 (0.0 \leq x \leq 0.10) were prepared by using a co-precipitation method. XRD measurements indicate that all samples exhibit single phase nature with cubic structure and ruled out the presence of any secondary phase. Lattice parameters, strain and particle size calculated from XRD data have been found to decrease with increase in Ni doping. Inter-planner distance measured from HR-TEM images for different Ni doped samples indicate that Ni ions are substituting Ce ions in CeO2 matrix. Magnetization measurements performed at room temperature display weak ferromagnetic behavior of Ce1-xNixO2 (0.0 \leq x \leq 0.10) nanoparticles. Magnetic moment calculated from magnetic hysteresis loop was found to increases with Ni doping up to 7% and then start decreasing with further doping.