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Extremely high density magnetic recording media, with production methodology controlled longitudinal/perpendicular orientation, grain size and coercivity
Extremely high density magnetic recording media, with production methodology controlled longitudinal/perpendicular orientation, grain size and coercivity
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机译：极高密度的磁记录介质，其生产方法可控制纵向/垂直方向，晶粒尺寸和矫顽力
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摘要
Disclosed is a modulated grain-composition magnetic recording material with up to terabit areal density recording capacity which, preferably, is produced by sequential vacuum deposition and subsequent annealing procedures that allow selective fabrication of magnetic material with desired grain size and coercivity, and with desired longitudinal or perpendicular magnetic particle “c-axis” orientation. The preferred magnetic recording material has multiple layers of FePt/B2O3 and/or Fe/Pt/B2O3, with minimum grain size of approximately ten (10) nanometers, with perpendicularly oriented “c-axis”, and with coercivity (Hc) of up to twelve (12) K-Oe. The preferred fabrication procedure involves sequential sputter deposition of FePt and B2O3 layers, followed by an anneal step.
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机译：公开了一种调制的晶粒组成的磁记录材料，其具有高达兆位单位的面密度记录容量，其优选地是通过顺序真空沉积和随后的退火程序生产的，该程序允许选择性地制造具有所需晶粒尺寸和矫顽力以及所需纵向尺寸的磁性材料或垂直的磁性粒子“ c轴”方向。优选的磁记录材料具有多层FePt / B 2 O 3 和/或Fe / Pt / B 2 O 3 ，其最小晶粒尺寸约为十（10）纳米，垂直取向为“ c轴”，矫顽力（Hc）最高为十二（12）K-Oe。优选的制造过程包括依次溅射沉积FePt和B 2 O 3 层，然后进行退火步骤。
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