Perpendicular magnetic recording medium with exchange-coupled magnetic layers and improved coupling layer
A perpendicular magnetic recording medium has an "exchange-spring" type magnetic recording layer (RL) with an improved coupling layer (CL). The RL includes the first or lower ferromagnetic layer MAG, sometimes called the "media" layer, the second or upper ferromagnetic layer MAG,...
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| Sprache: | eng |
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| Zusammenfassung: | A perpendicular magnetic recording medium has an "exchange-spring" type magnetic recording layer (RL) with an improved coupling layer (CL). The RL includes the first or lower ferromagnetic layer MAG, sometimes called the "media" layer, the second or upper ferromagnetic layer MAG, sometimes called the "exchange-spring" layer, and the intermediate CL that provides ferromagnetic exchange coupling between MAG and MAG. The CL is formed of NiCr or RuCr based alloys, or CoCr or CoCrB alloys with high Cr and/or B content (Cr plus B>about 25 atomic percent), or RuCoCr alloys with low Co content ( |
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