The interplay between single particle anisotropy and interparticle interactions in ensembles of magnetic nanoparticles

• DOI: 10.1039/c8cp03934h
• Publication Date: 2018-11-08T10:00:13Z
• Authors: G. Muscas; G. Concas; S. Laureti; A. M. Testa; R. Mathieu; J. A. De Toro; C. Cannas; A. Musinu; M. A. Novak; C. Sangregorio; Su Seong Lee; D. Peddis
• Keywords: Maghemite; Particle (ecology); Cobalt Ferrite

This paper aims to analyze the competition of single particle anisotropy and interparticle interactions in nanoparticle ensembles using a random model. The model is first applied ideal systems non-interacting strongly dipolar interacting maghemite nanoparticles. investigation then extended more complex pure cobalt ferrite CoFe2O4 (CFO) mixed cobalt-nickel (Co,Ni)Fe2O4 (CNFO) Both samples were synthetized by polyol process exhibit same size (DTEM ≈ 5 nm), but with different interaction strengths anisotropy. implementation allows influence interactions, sheds light on their interplay as well individual contribution. analysis fundamental importance order understand physics these develop technological applications based concentrated magnetic nanoparticles, where collective behaviors coexist.