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MAGNETIC TAPE DEVICE AND HEAD TRACKING SERVO METHOD

  • US 20190088278A1
  • Filed: 11/06/2018
  • Published: 03/21/2019
  • Est. Priority Date: 03/29/2017
  • Status: Active Grant
First Claim
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1. A magnetic tape device comprising:

  • a magnetic tape; and

    a servo head,wherein the servo head is a magnetic head including a tunnel magnetoresistance effect type element as a servo pattern reading element,the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support,the magnetic layer includes a servo pattern,the ferromagnetic powder is ferromagnetic hexagonal ferrite powder,an intensity ratio Int(110)/Int(114) of a peak intensity Int(110) of a diffraction peak of a (110) plane with respect to a peak intensity Int(114) of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0,a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00, anda C-H derived C concentration calculated from a C-H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed on the surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 45 to 65 atom %.

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