Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8943586 | Journal of Magnetism and Magnetic Materials | 2019 | 31 Pages |
Abstract
Ferrite based hard-soft magnetic nanocomposites with the composition of (100â¯ââ¯x) SrFe10Al2O19/(x) Co0.8Ni0.2Fe2O4, where xâ¯=â¯10, 15, 20 and 30â¯wt%, were prepared by one-pot sol-gel auto-combustion method. The nanocomposites prepared by this method showed crystallographically two phase behavior, but magnetically a good single phase exchange spring-coupled behavior with high saturation as well as high coercivity. The nature of magnetic interactions in these nanocomposites and their magnetic properties were evaluated in detail using various characteristic methods including vibrating sample magnetometer measurements, Henkel plots measurements, magnetic force microscopy and magneto-optical Kerr effect microscopy. Microstructural evolution showed formation of soft phase below the critical size of exchange length in the vicinity of hard phase. The nanocomposite with 15â¯wt% of soft phase showed a 10.5% increase in the maximum energy product compared to pure hard phase and reaches as high as 29.5â¯kJ/m3 that is a high value of (BH)max for this type of materials.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Shahab Torkian, Ali Ghasemi,