Nickel doping has been found to produce weak room-temperature ferromagnetism in CeO2 [1]. The saturation magnetization of the chemically synthesized Ce1-xNixO2 samples showed a maximum for x = 0.04, above which the magnetization decreased gradually. For Ce1-xNixO2 samples with x = 0.04, an activation process involving slow annealing of the sample to 500 oC increased the saturation magnetization by more than two orders of magnitude [1]. However, no such activation effect was observed in samples with x 0.04 and (ii)_what causes the saturation magnetization to dramatically increase in the activated Ce1-xNixO2 samples with x = 0.04 and why this process is absent in samples with x
Revised: April 7, 2011 |
Published: April 1, 2008
Citation
Misra S.K., S.I. Andronenko, M.H. Engelhard, A.P. Thurber, K.M. Reddy, and A. Punnoose. 2008.Role of dopant incorporation on the magnetic properties of Ce1-xNixO2 nanoparticles: An electron paramagnetic resonance study.Journal of Applied Physics 103, no. 7:Art. No. 07D122.PNNL-SA-57289.