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Magnetic recording medium with multiple exchange coupling layers and small grain magnetic layers
Magnetic recording medium with multiple exchange coupling layers and small grain magnetic layers
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机译:具有多个交换耦合层和小颗粒磁性层的磁记录介质
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摘要
According to one embodiment, a magnetic recording medium includes: a substrate; and a magnetic recording layer structure formed above the substrate. The magnetic recording layer structure includes five or more magnetic recording layers and four or more nonmagnetic exchange coupling layers, where the magnetic recording layers and the nonmagnetic exchange coupling layers are arranged in an alternating pattern, and where the magnetic recording layers are separated from each other by least one of the nonmagnetic exchange coupling layers. The magnetic recording layer positioned closest to the substrate has each of the following: an average magnetic grain pitch of about 8.3 nm or less, a magnetic anisotropy field (Hk) value of greater than or equal to about 20 kOe, and a thickness that is about 40% of a total thickness of the magnetic recording layer structure.
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机译:根据一个实施例,一种磁记录介质包括:基板;磁记录层结构形成在基板上方。磁记录层结构包括五个或更多个磁记录层和四个或更多个非磁交换耦合层,其中,磁记录层和非磁交换耦合层以交替图案布置,并且磁记录层彼此分离。通过至少一个非磁性交换耦合层。最靠近基板的磁记录层具有以下各项:平均磁晶粒距约为8.3 nm或更小,磁各向异性场(H k Sub>)值大于或等于大约20 kOe,厚度约为磁记录层结构总厚度的40%。
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