Journal
CHEMISTRY OF MATERIALS
Volume 29, Issue 12, Pages 5200-5206Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.7b00868
Keywords
-
Funding
- Spanish Ministerio de Economia y Competitividad
- MINECO [MAT2011-26207]
- Generalitat de Catalunya [2014-SGR-1015]
- Junta de Comunidades de Castilla La Mancha [PEII-2014-042-P]
- Severo Ochoa Program (MINECO) [SEV-2013-0295]
Ask authors/readers for more resources
The exchange bias properties of 5 nm Co/CoO ferromagnetic/antiferromagnetic core/shell nanoparticles, highly dispersed in a CuxO matrix, have been optimized by matching the lattice parameter of the matrix with that of the CoO shell. Exchange bias and coercivity fields as large as H-E = 7780 Oe and He = 6950 Oe are linked to the presence of a Cu2O matrix (0.3% lattice mismatch with respect to the shells). The small mismatch between Cu2O and CoO plays a dual role: it (i) structurally stabilizes the CoO and (ii) favors the existence of a large amount of uncompensated moments in the shell that enhance the exchange bias effects. The results indicate that lattice matching may be a very efficient way to improve the exchange bias properties of core/shell nanoparticles, paving the way to novel approaches to tune their magnetic properties.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available