[HTML][HTML] High coercivity induced by mechanical milling in cobalt ferrite powders
In this work we report a study of the magnetic behavior of ferrimagnetic oxide CoFe 2 O 4
treated by mechanical milling with different grinding balls. The cobalt ferrite nanoparticles
were prepared using a simple hydrothermal method and annealed at 500° C. The non-
milled sample presented coercivity of about 1.9 kOe, saturation magnetization of 69.5 emu/g,
and a remanence ratio of 0.42. After milling, two samples attained coercivity of 4.2 and 4.1
kOe, and saturation magnetization of 67.0 and 71.4 emu/g respectively. The remanence …
treated by mechanical milling with different grinding balls. The cobalt ferrite nanoparticles
were prepared using a simple hydrothermal method and annealed at 500° C. The non-
milled sample presented coercivity of about 1.9 kOe, saturation magnetization of 69.5 emu/g,
and a remanence ratio of 0.42. After milling, two samples attained coercivity of 4.2 and 4.1
kOe, and saturation magnetization of 67.0 and 71.4 emu/g respectively. The remanence …
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