Ferrite sintered magnet, ferrite particles, bonded magnet, and rotating electrical machine

A ferrite sintered magnet containing a ferrite phase having a magnetoplumbite-type crystal structure, containing:

• at least Ca, a metal element A, a metal element R, Bi, Fe, and a metal element M,
• wherein the metal element A is at least one kind of element selected from the group consisting of Sr, Ba, and Pb,
• the metal element R is at least one kind of element selected from the group consisting of rare-earth elements including Y and essentially includes La,
• the metal element M is at least one kind of element selected from the group consisting of Co, Ni, Zn, Al, Cu, and Cr, and essentially includes Co, and
• when an atomic ratio of the metal elements is expressed by Formula (1), c, a, r, b, f, and m in Formula (1) satisfy the following Expressions (2) to (8),
• CacAaRrBibFefMm (1)
• 0.15≤c≤0.5 (2)
• 0.01≤a≤0.1 (3)
• 0.45<r≤0.80 (4)
• 0.01≤b<0.1 (5)
• 9.35<f<11.90 (6)
• 0.1≤m≤0.50 (7)
• c+a+r+b=1 (8)