Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus

A magnetic tape comprising:

• a non-magnetic support;
• a magnetic layer including ferromagnetic powder;
• a non-magnetic layer including non-magnetic powder between the non-magnetic support and the magnetic layer;
• and
• a back coating layer on a surface side of the non-magnetic support opposite to a surface side provided with the magnetic layer,
• wherein the magnetic layer has a timing-based servo pattern,
• wherein the ferromagnetic powder is at least one ferromagnetic powder selected from the group consisting of hexagonal ferrite powder and ε-iron oxide powder
• wherein an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference L99.9−L0.1 between a value L99.9 of a cumulative distribution function of 99.9% and a value L0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and
• wherein a difference Safter−Sbefore between a spacing Safter measured on a surface of the magnetic layer by an optical interferometry after methyl-ethyl-ketone cleaning and a spacing Sbefore measured on the surface of the magnetic layer by an optical interferometry before methyl-ethyl-ketone cleaning is greater than 0 nm and 15.0 nm or less.