MAGNETIC RECORDING MEDIUM

A magnetic recording medium includes a substrate, a seed layer, an under layer, and a perpendicular recording layer having a granular structure. (Ms·αδ1.5(1−Rs)0.33), Ms, and α satisfy (Ms·α·δ1.5(1−Rs)0.33)≦0.1 [μ·emu·(mm)−1.5], Ms≧450 [emu/cc], and α≧1.2. In the above formulas, Ms indicates a satur...

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Bibliographische Detailangaben
Hauptverfasser:	Tachibana Junichi, Sekiguchi Noboru, Ozaki Tomoe
Format:	Patent
Sprache:	eng
Schlagworte:	INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER PHYSICS
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Beschreibung
Zusammenfassung:	A magnetic recording medium includes a substrate, a seed layer, an under layer, and a perpendicular recording layer having a granular structure. (Ms·αδ1.5(1−Rs)0.33), Ms, and α satisfy (Ms·α·δ1.5(1−Rs)0.33)≦0.1 [μ·emu·(mm)−1.5], Ms≧450 [emu/cc], and α≧1.2. In the above formulas, Ms indicates a saturated magnetization amount, α indicates the gradient of a M-H loop around a coercive force Hc, δ indicates the thickness of the perpendicular recording layer, and Rs indicates a squareness ratio.