Back to results
US 12,159,657 B2Granted
Magnetic recording medium having characterized magnetic layer, magnetic tape cartridge, and magnetic recording and reproducing device
AssigneeFUJIFILM Corporation
InventorsEiki Ozawa, Takashi Fujimoto
Life of this patent
Estimating the term…
Abstract
Provided are a magnetic recording medium including a non-magnetic support, and a magnetic layer including a ferromagnetic powder. The ferromagnetic powder is an ε-iron oxide powder, and an intensity ratio (Int1/Int2) of diffraction intensities obtained by an X-ray diffraction analysis of the magnetic layer using an In-Plane method after the magnetic layer is pressed at a pressure of 70 atm is 1.0 or more and 6.5 or less, a magnetic tape cartridge and a magnetic recording and reproducing device each including the magnetic recording medium.
Claims18
A magnetic recording medium comprising:
- a non-magnetic support;
- and
- a magnetic layer containing a ferromagnetic powder,
- wherein the ferromagnetic powder is an ε-iron oxide powder,
- Int1/Int2, which is an intensity ratio of diffraction intensities obtained by an X-ray diffraction analysis of the magnetic layer using an In-Plane method after the magnetic layer is pressed at a pressure of 70 atm, is 1.0 or more and 6.5 or less,
- the Int1 is a maximum value of a diffraction intensity in a range in which a diffraction angle 2θχ is 29.0° or more and 31.0° or less, and
- the Int2 is a maximum value of a diffraction intensity in a range in which the diffraction angle 2θχ is 36.3° or more and 37.5° or less.
4 more elements
Dependencies are inferred from the claim text.