Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus

A magnetic tape comprising:

• a non-magnetic support;
• and
• a magnetic layer containing a ferromagnetic powder,
• wherein a half-width of a frictional force is 200 mV or less,
• standard deviation σ of the half-width of the frictional force in a width direction of the surface of the magnetic layer is 50.0 mV or less, and
• the half-width of the frictional force is measured on a surface of the magnetic layer with a lateral force microscope at 23° C. and 50% RH on a 10 μm ×10 μm area of the magnetic layer surface at a resolution of 512 pixels ×512 pixels, with the half-width of the frictional force being taken as an arithmetic average of five different measurements of a full width at half maximum FWHM) of a frictional force distribution curve measured at five different 10 μm ×10 μm areas in a width direction position of the tape but a same randomly selected longitudinal direction position of the tape.