| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic recording medium concurrently having superior electromagnetic conversion characteristics and friction characteristics. SOLUTION: The present invention relates to a magnetic recording medium having a magnetic layer comprising ferromagnetic powder and a binder on a nonmagnetic support. The height of protrusions with a protrusion density of 0.002 protrusion/μm<SP>2</SP>or lower on a surface of the magnetic layer, as measured by an atomic force microscope is 40 nm or lower; a density of protrusions that are 15 nm or higher in height on the surface of the magnetic layer as measured by the atomic force microscope is in a range of 0.01 to 0.18 protrusion/μm<SP>2</SP>; and the protrusions that are 15 nm or higher in height include protrusions formed of carbon black and protrusions formed of a substance with a Mohs hardness exceeding 7, and an average height of the protrusions formed of carbon black is greater than an average height of the protrusions formed of the substance with a Mohs hardness exceeding 7. Furthermore, the present invention relates to a magnetic signal reproduction system, including the magnetic recording medium and a magnetic signal reproduction method using the magnetic recording medium. COPYRIGHT: (C)2011,JPO&INPIT
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