Physical and magnetic properties of highly anisotropic cobalt ferrite particles

Magnetic, electric and thermal properties of cobalt ferrite nanoparticles

“…This is due to the surface anisotropy, the size and shape related effects [2,60] and to the presence of Co 2+ ions in the octahedral sites of the spinel structure [47]. In fact, in bulk …”

“…In form of nanomaterials, ferrites may have superparamagnetic properties [2] and are currently used in magnetic data storage, magnetic imaging, drug delivery and microwave devices [3][4].…”

“…It is well known that the efficiency of a catalytic conversion increases with the amount of exposed surface, which is related to the size and the shape of the particles, with the nature of the exposed cation sites, and the number and type of defects at the surface [17,18]. In nanostructured magnetic materials, surface effects usually lead to increased magnetization or superparamagnetism [2].Electric properties are also linked to the particle size, to the cation distribution and to the occurrence of vacancies [19,20].…”

Synthesis and microstructure of cobalt ferrite nanoparticles

“…Cobalt ferrites have already many applications, mainly because of their original magnetic properties [1][2][3], associated to low cost of production, chemical stability and bio compatibility. Nanoparticles of cobalt ferrites are used for example in ferrofluid technology [4], biosensors [5] and medical diagnostic [6].…”

Magnetic and optical response of tuning the magnetocrystalline anisotropy in Fe3O4 nanoparticle ferrofluids by Co doping

“…While both Fe 3 O 4 and CoFe 2 O 4 have an inverse spinel structure, the magnetocrystalline anisotropy for Fe 3 O 4 nanoparticles is 14 kJ/m 3 [7], which increases to 380 kJ/m 3 for CoFe 2 O 4 [8]. This large difference in K values allows the possibility of controlling the magnetic properties of iron oxide nanoparticles by doping small amounts of cobalt into Fe 3 [10].…”