Nanoscale-driven single-domain structure in nickel substituted superparamagnetic cobalt ferrites
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2022
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In this letter, we reported nickel substituted cobalt nano-ferrites of ∼ 5 nm particle size synthesized with forced
hydrolysis methods. The magnitude of the anisotropy constant decreases from 6.06 × 105
to 2.45 × 104 erg/cm3
due to the 𝑁 𝑖2+ doping. Whereas the gradual increment of 𝑁 𝑖2+ ions decreases the blocking temperature
from ∼182 k to ∼52 K. The single-domain superparamagnetic behaviour observed here above the blocking
temperature. This behaviour could help the material be a promising candidate in quantum technologies as a
bit for storage devices.
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Nanostructures, Materials physics, Magnetism
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MELO, Rosane S.; FRANCO JR., Adolfo; BANERJEE, Prasun. Nanoscale-driven single-domain structure in nickel substituted superparamagnetic cobalt ferrites. Solid State Communications, Amsterdam. v. 341, e114560, 2021. DOI: 10.1016/j.ssc.2021.114560. Disponível em: https://www.sciencedirect.com/science/article/pii/S0038109821003446. Acesso em: 4 set. 2023.