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Microstructure and Magnetic Properties of Exchange-Coupled CoPt/Pt/CoIr Composite Media for Perpendicular Magnetic Recording

Journal of Superconductivity and Novel Magnetism, ISSN: 1557-1947, Vol: 32, Issue: 7, Page: 2229-2233
2019
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  • Citations
    5

Article Description

In this work, we report the investigation of microstructure and magnetic properties of the CoPt/Pt/CoIr exchange-coupled composite (ECC) media using soft-layer (SL) of CoIr with negative magnetocrystalline anisotropy (MA). Our TEM images show that the hard-layer (HL) exhibits a columnar type microstructure with well-isolated grains and the exchange-coupled SL with hcp-structure show the same texture. Strong coupling of the two layers have been evidenced by the magnetic characterization for all the studied films with Pt inter-layer thickness ranging from 0 to 2 nm. Importantly, these ECC media films have much lower coercivities and much higher thermal stabilities in the favor of high-density magnetic recording.

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