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Microstructure and Magnetic Properties of Exchange-Coupled Co72Pt28/Pt/Co81Ir19 Composite Media for Perpendicular Magnetic Recording

  • Z. W. LiEmail author
  • J. Y. Jiao
  • Z. Luo
  • T. Y. Ma
  • L. Qiao
  • Y. Wang
  • T. Wang
  • F. S. Li
Original Paper
  • 21 Downloads

Abstract

In this work, we report the investigation of microstructure and magnetic properties of the Co72Pt28/Pt/Co81Ir19 exchange-coupled composite (ECC) media using soft-layer (SL) of Co81Ir19 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.

Keywords

Magnetic thin film Negative magnetocrystalline anisotropy ECC media 

Notes

Funding Information

This work was supported by the National Natural Science Foundations of China (Nos. 11704167 and 11574122) and the Fundamental Research Funds for the Central Universities (Nos. lzujbky-2017-k20 and lzujbky-2017-31).

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Authors and Affiliations

  1. 1.Key Lab for Magnetism and Magnetic Materials of the MOE, Key Lab for Special Functional Materials and Structure Design of the MOELanzhou UniversityLanzhouPeople’s Republic of China

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