Magnetic recording medium
First Claim
1. A magnetic recording medium comprising a support having provided thereon a nonmagnetic layer containing a nonmagnetic powder dispersed in a binder and a magnetic layer containing a ferromagnetic powder dispersed in a binder provided on the nonmagnetic layer, wherein the magnetic layer comprises a hexagonal ferrite powder having an average tabular diameter of from 10 to 35 nm, a coercive force (Hc) of from 135 to 400 kA/m, SFD (Switching Field Distribution) (25°
- C.) of from 0.40 to 0.90, and Δ
SFD [SFD (100°
C.)−
SFD (25°
C.)] of from −
0.15 to 0.20.
2 Assignments
0 Petitions
Accused Products
Abstract
A magnetic recording medium comprising a support having provided thereon a nonmagnetic layer containing a nonmagnetic powder dispersed in a binder and a magnetic layer containing a ferromagnetic powder dispersed in a binder provided on the nonmagnetic layer, wherein the magnetic layer comprises a hexagonal ferrite powder having an average tabular diameter of from 10 to 35 nm, a coercive force (Hc) of from 135 to 400 kA/m, SFD (Switching Field Distribution) (25° C.) of from 0.40 to 0.90, and Δ SFD [SFD (100° C.)−SFD (25° C.)] of from 0.15 to 0.20.
-
Citations
7 Claims
-
1. A magnetic recording medium comprising a support having provided thereon a nonmagnetic layer containing a nonmagnetic powder dispersed in a binder and a magnetic layer containing a ferromagnetic powder dispersed in a binder provided on the nonmagnetic layer, wherein the magnetic layer comprises a hexagonal ferrite powder having an average tabular diameter of from 10 to 35 nm, a coercive force (Hc) of from 135 to 400 kA/m, SFD (Switching Field Distribution) (25°
- C.) of from 0.40 to 0.90, and Δ
SFD [SFD (100°
C.)−
SFD (25°
C.)] of from −
0.15 to 0.20. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- C.) of from 0.40 to 0.90, and Δ
Specification