Magnetic tape having characterized magnetic layer, magnetic tape cartridge, and magnetic tape apparatus
The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. One or more components selected from the group consisting of a fatty acid and a fatty acid amide are included in a portion on the non-magnetic support on a magnetic layer side, a C—H derived C concentration calculated from a C—H peak surface area ratio of C1s spectra obtained by X-ray photoelectron spectroscopy performed on a surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 50 at % or more, and standard deviation σ of the C—H derived C concentration in a width direction of the surface of the magnetic layer is 2.0 at % or less.
1. A magnetic tape comprising:
a non-magnetic support;
a magnetic layer containing a ferromagnetic powder, and
a non-magnetic layer containing a non-magnetic powder between the non-magnetic support and the magnetic layer,
wherein one or more components selected from the group consisting of a fatty acid and a fatty acid amide are included in a portion on the non-magnetic support on a magnetic layer side,
a C—H derived C concentration calculated from a C—H peak surface area ratio of C1s spectra obtained by X-ray photoelectron spectroscopy performed on a surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 50 at % or more,
standard deviation σ of the C—H derived C concentration in a width direction of the surface of the magnetic layer is 2.0 at % or less,
a fluorine-containing compound is included in the portion on the non-magnetic support on the magnetic layer side,
the non-magnetic powder includes an Fe-based inorganic oxide powder having an average particle volume of 2.0×10 −6 μm 3 or less, and
the non-magnetic powder includes carbon black having a pH of 9.0 or less.
2. The magnetic tape according to claim 1 ,
wherein the standard deviation σ of the C—H derived C concentration is 0.2 at % or more and 2.0 at % or less.
3. The magnetic tape according to claim 1 ,
wherein the standard deviation σ of the C—H derived C concentration is 0.2 at % or more and 0.5 at % or less.
4. The magnetic tape according to claim 1 ,
wherein the C—H derived C concentration is 50 at % or more and 65 at % or less.
5. The magnetic tape according to claim 1 ,
wherein a thickness of the non-magnetic layer is 0.1 μm or more and 0.7 μm or less.
6. The magnetic tape according to claim 1 , further comprising:
a back coating layer containing a non-magnetic powder on a surface side of the non-magnetic support opposite to a surface side having the magnetic layer.
7. The magnetic tape according to claim 1 ,
wherein a tape thickness is 5.2 μm or less.
8. The magnetic tape according to claim 1 ,
wherein a tape thickness is 5.0 μm or less.
9. The magnetic tape according to claim 1 ,
wherein a vertical squareness ratio of the magnetic tape is 0.60 or more.
10. The magnetic tape according to claim 1 ,
wherein a vertical squareness ratio of the magnetic tape is 0.65 or more.
11. The magnetic tape according to claim 1 ,
wherein the standard deviation σ of the C—H derived C concentration is 0.2 at % or more and 0.5 at % or less,
the C—H derived C concentration is 50 at % or more and 65 at % or less,
a thickness of the non-magnetic layer is 0.1 μm or more and 0.7 μm or less,
the magnetic tape further includes a back coating layer containing a non-magnetic powder on a surface side of the non-magnetic support opposite to a surface side having the magnetic layer,
a tape thickness is 5.0 μm or less, and
a vertical squareness ratio of the magnetic tape is 0.65 or more.
12. A magnetic tape cartridge comprising:
the magnetic tape according to claim 1 .
13. A magnetic tape apparatus comprising:
the magnetic tape according to claim 1 .
14. The magnetic tape apparatus according to claim 13 , further comprising:
a magnetic head,
wherein the magnetic head has a module including an element array with a plurality of magnetic head elements between a pair of servo signal reading elements, and
the magnetic tape apparatus changes an angle θ formed by an axis of the element array with respect to a width direction of the magnetic tape during running of the magnetic tape in the magnetic tape apparatus.
15. The magnetic tape according to claim 1 ,
wherein a non-linear component in the tape width direction generated by storage for 10 days in an environment of a temperature of 60° C. and a relative humidity of 20% is 100 nm or less.