MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE
First Claim
1. A magnetic recording medium comprising:
- a non-magnetic support; and
a magnetic layer including a ferromagnetic powder and a binding agent,wherein the ferromagnetic powder is a ferromagnetic hexagonal ferrite powder,the magnetic layer includes an oxide abrasive,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 squareness ratio of the magnetic recording medium is 0.65 to 1.00,a contact angle with respect to 1-bromonaphthalene measured regarding a surface of the magnetic layer is 50.0°
to 55.0°
, andan average particle diameter of the oxide abrasive obtained from a secondary ion image obtained by irradiating the surface of the magnetic layer with a focused ion beam is 0.04 μ
m to 0.08 μ
m.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided are a magnetic recording medium, in which a magnetic layer includes a ferromagnetic hexagonal ferrite powder, a binding agent, and an oxide abrasive, an intensity ratio Int(110)/Int(114) 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 squareness ratio of the magnetic recording medium is 0.65 to 1.00, a contact angle with respect to 1-bromonaphthalene measured regarding a surface of the magnetic layer is 50.0° to 55.0°, and an average particle diameter of the oxide abrasive obtained from a secondary ion image obtained by irradiating the surface of the magnetic layer with a focused ion beam is 0.04 μm to 0.08 μm, and a magnetic recording and reproducing device including this magnetic recording medium.
139 Citations
17 Claims
-
1. A magnetic recording medium comprising:
-
a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent, wherein the ferromagnetic powder is a ferromagnetic hexagonal ferrite powder, the magnetic layer includes an oxide abrasive, 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 squareness ratio of the magnetic recording medium is 0.65 to 1.00, a contact angle with respect to 1-bromonaphthalene measured regarding a surface of the magnetic layer is 50.0°
to 55.0°
, andan average particle diameter of the oxide abrasive obtained from a secondary ion image obtained by irradiating the surface of the magnetic layer with a focused ion beam is 0.04 μ
m to 0.08 μ
m. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. A magnetic recording and reproducing device comprising:
-
a magnetic recording medium; and a magnetic head, wherein the magnetic recording medium is a magnetic recording medium comprising; a non-magnetic support; and a magnetic layer including a ferromagnetic powder and a binding agent, wherein the ferromagnetic powder is a ferromagnetic hexagonal ferrite powder, the magnetic layer includes an oxide abrasive, 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 squareness ratio of the magnetic recording medium is 0.65 to 1.00, a contact angle with respect to 1-bromonaphthalene measured regarding a surface of the magnetic layer is 50.0°
to 55.0°
, andan average particle diameter of the oxide abrasive obtained from a secondary ion image obtained by irradiating the surface of the magnetic layer with a focused ion beam is 0.04 μ
m to 0.08 μ
m. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
-
Specification