Magnetic properties of NiO nanoparticles
By S. Tiwari, K.P.Rajeev. 2004
147 citations recorded by the source corpus.
Abstract Nickel oxide nanoparticles of different sizes are prepared by a sol–gel method. Samples are characterized by X-ray diffraction and transmission electron microscopy. Dc susceptibility measurements as a function of temperature and field are done for various particle sizes. We find peaks in zero field cooled susceptibility vs. temperature curves. In sufficiently low fields the peak temperature decreases with increasing particle size whereas at higher fields the peak temperature increases with increasing particle size. We propose that these nanoparticles consist of antiferromagnetically aligned core spins and a spin glass like surface layer.
Subfields: Condensed Matter Physics, Polymers and Plastics, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/c53f3665d864fc46ee2ce502690b6016b0756abc
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Citations in the corpus
- Magnon and Phonon Excitations in Nanosized NiO (2019, background): “Apart from the antiferromagnetically ordered core, magnetically-disordered uncompensated spins exist at the surface of NiO nanoparticles [23]–[29], leading to a super-paramagnetic behaviour [30].”