Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8153120 | Journal of Magnetism and Magnetic Materials | 2018 | 14 Pages |
Abstract
Superparamagnetic β-NaFeO2 nanoparticles of particle size 37â¯nm with orthorhombic crystal structure and space group Pn21a have been prepared by sol-gel method. Temperature dependent magnetic study has been performed. Its systematic analysis has been done to calculate the Curie and blocking temperatures along with its magnetic susceptibility. The Langevin fitting of the magnetic data has been carried out. It has been shown that the synthesized nanoparticles exhibit superparamagnetic behavior. The Neel's relaxation time has been calculated to further support its superparamagnetic nature. The synthesized β-NaFeO2 nanoparticles behave like ferromagnets below 80â¯K; they are superparamagnetic above 80â¯K-340â¯K and thereafter as paramagnetic. The possible mechanism of superparamagnetism has been discussed. It has been concluded that these nanoparticles can find wide applications in the area of biomedical sciences.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Sarbjit Singh, Alexandr Tovstolytkin, Gurmeet Singh Lotey,