Ferrite composition, ferrite sintered body, electronic device, and chip coil

A ferrite composition comprising a main component and an accessory component, wherein

• the main component includes:
• 43.0 to 51.0 mol % of iron oxide in terms of Fe2O3;
• 5.0 to 15.0 mol % of copper oxide in terms of CuO;
• 1.0 to 24.9 mol % of zinc oxide in terms of ZnO;
• and
• a remaining part of nickel oxide, and
• the accessory component includes:
• 0.2 to 3.0 pts. wt. of silicon compound in terms of SiO2;
• 3.1 to 8.0 pts. wt. of cobalt compound in terms of Co3O4;
• and
• 0.3 to 8.0 pts. wt. of bismuth compound in terms of Bi2O3 with respect to 100 pts. wt. of the main component,
• the ferrite composition has a resistivity ρ of 1.00×105 Ω·m or more, μ′ at 10 MHz of 4.5 or more, μ′ at 900 MHz of 5.5 or more, and an absolute value of a change rate of initial permeability μi at 125° C. based on initial permeability μi at 25° C. of 100% or less.