METHOD FOR FABRICATING A PATTERNED COMPOSITE STRUCTURE

摘要

The embodiments disclose a patterned composite magnetic layer structure configured to use magnetic materials having differing temperature and magnetization characteristics in a recording device, wherein the patterned composite magnetic layer structure includes magnetic layers, at least one first magnetic material configured to be used in a particular order to reduce a recording temperature and configured to control and regulate coupling and decoupling of the magnetic layers and at least one second magnetic material with differing temperature characteristics is configured to control recording and erasing of data.

主权项

1. A method for fabricating a patterned composite structure, comprising:
creating a patterned composite magnetic layer structure in at least one stack feature of a recording device,
wherein the patterned composite magnetic layer structure includes plural magnetic layers; using different magnetic materials having differing temperature and magnetization characteristics for the magnetic layers; and selectively raising and lowering temperatures of the patterned composite magnetic layer structure for controlling and regulating coupling and decoupling of the magnetic layers, and further comprising: using materials that go through AF-FM transition or ferri-to-ferro transition; using materials for two or more high-Hk layers that are strongly coupled at room temperature; and using materials for a break layer the coupling for which becomes weaker at elevated temperature near Tc of the break layer and materials for a composite magnetic layer stack that can be switched via an exchange spring mechanism,
wherein selectively raising and lowering temperatures is used for reducing power levels, preventing changes in the magnetic materials due to freezing in a non-magnetic state, and reducing switching field distribution (SFD).