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Co-doped MnFe2O4 nanoparticles: magnetic anisotropy and interparticle interactions.


ABSTRACT: The effect of cobalt doping on the magnetic properties of Mn1- x Co x Fe2O4 nanoparticles was investigated. All samples consist of ensembles of nanoparticles with a spherical shape and average diameter of about 10 nm, showing small structural changes due to the substitution. Besides having the same morpho-structural properties, the effect of the chemical composition, i.e., the amount of Co doping, produces marked differences on the magnetic properties, especially on the magnetic anisotropy, with evident large changes in the coercive field. Moreover, Co substitution has a profound effect on the interparticle interactions, too. A dipolar-based interaction regime is detected for all samples; in addition, the intensity of the interactions shows a possible relation with the single particle anisotropy. Finally, the sample with the strongest interaction regime shows a superspin glass state confirmed by memory effect dynamics.

SUBMITTER: Aslibeiki B 

PROVIDER: S-EPMC6466680 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature

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Co-doped MnFe<sub>2</sub>O<sub>4</sub> nanoparticles: magnetic anisotropy and interparticle interactions.

Aslibeiki Bagher B   Kameli Parviz P   Salamati Hadi H   Concas Giorgio G   Salvador Fernandez Maria M   Talone Alessandro A   Muscas Giuseppe G   Peddis Davide D  

Beilstein journal of nanotechnology 20190412


The effect of cobalt doping on the magnetic properties of Mn<sub>1-</sub> <i><sub>x</sub></i> Co <i><sub>x</sub></i> Fe<sub>2</sub>O<sub>4</sub> nanoparticles was investigated. All samples consist of ensembles of nanoparticles with a spherical shape and average diameter of about 10 nm, showing small structural changes due to the substitution. Besides having the same morpho-structural properties, the effect of the chemical composition, i.e., the amount of Co doping, produces marked differences on  ...[more]

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