| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5459181 | Journal of Alloys and Compounds | 2017 | 7 Pages |
Abstract
Ferri/antiferromagnetic BaFe12O19/Co3O4 nanocomposites were prepared by annealing the compacted mixture of hydrothermal BaFe12O19 and Co(OH)2 nanoplates at 400 °C for 12 h. The microstructural characterization by XRD, FESEM/EDS, TEM, TG/DSC and Raman spectroscopy revealed that hexagonal Co(OH)2 was transformed into cubic Co3O4 spinel when co-annealed with ferrimagnetic BaFe12O19. This transformation, accompanied by a grain-refining process, produced homogeneously and intimately bound BaFe12O19/Co3O4 nanocomposite particles with a remarkable exchange bias field in the magnetization. Moreover, the coercivity and remanence of the BaFe12O19/Co3O4 nanocomposite with a mass ratio of 2:1 were enhanced by 26.1% and 25.2%, respectively, compared to the parent BaFe12O19 due to the strong interfacial exchange coupling interactions between the ferri- and antiferromagnetic phases. In addition, the maximal magnetic energy product of BaFe12O19 was also enhanced by 70.9%.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Liangliang Cao, Zhentao Wang, Zhupeng Ye, Yuan Zhang, Longfei Zhao, Yanwei (Professor),