Magnetic carrier, two-component developer, and method for producing magnetic carrier

A magnetic carrier, comprising:

• a magnetic carrier particle comprising, in this order, a magnetic core particle, a primer layer, and a coating layer;
• the primer layer comprising a vinyl polymer with a monomer unit derived from cycloalkyl (meth)acrylate;
• and
• the coating layer comprising an organosilicon polymer with the structure
• R—Si(O1/2)3 (T3)
• where R represents an alkyl group having 1 to 6 carbons, a phenyl group, an amino group or an alkylamino group having 1 to 5 carbons, wherein
• the ratio ST3 of the peak area for the structure of (T3) to the total peak area for the organosilicon polymer is at least 0.05 in 29Si-NMR measurement of the tetrahydrofuran-insoluble matter of the organosilicon polymer,
• in the roughness curve measured on the magnetic carrier particle using a scanning probe microscope, (i) the mean width (RSm) of the roughness curve elements of the magnetic carrier particle is 20 to 500 nm and (ii) the ratio (σ/RSm) is not more than 0.80, where σ is the standard deviation of the width of the region where one period of a protrusion and a recess occurs, and
• the ratio (dSi/[dSi+dO+dC]) is at least 2.5 atom % in x-ray photoelectron spectroscopic analysis of the magnetic carrier, where dSi is the silicon atom concentration at the magnetic carrier surface, dO is the oxygen atom concentration at the magnetic carrier surface, and dC is the carbon atom concentration at the magnetic carrier surface.