Highly (001) oriented L10-CoPt/TiN multilayer films on glass substrates with perpendicular magnetic anisotropy

Hongyu An, Qian Xie, Jian Wang, Takumi Sannomiya, Shinji Muraishi, Zhengjun Zhang, Yoshio Nakamura, Ji Shi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

To obtain strong perpendicular magnetic anisotropy (PMA) based on L10 structure for magnetic storage devices, costly single crystalline substrates are generally required to achieve (001) texture. Recently, various studies also have focused on depositing different kinds of seed layers on glass or other amorphous substrates to promote (001) preferred orientation of L10 CoPt and FePt. TiN is a very promising seed layer material because of its cubic crystalline structure (similar to MgO) and excellent diffusion barring property even at high temperatures. In the present work, highly (001) oriented L10-CoPt/TiN multilayer films have been successfully deposited on glass substrates. After annealing at 700 °C, the film exhibits PMA, and a strong (001) peak is detected from the x-ray diffraction profiles, indicating the ordering transformation of CoPt layers from fcc (A1) to L10 structure. It also is found that alternate deposition of cubic TiN and CoPt effectively improves the crystallinity and (001) preferred orientation of CoPt layers. This effect is verified by the substantial enhancement of (001) reflection and PMA with increasing the period number of the multilayer films.

Original languageEnglish
Article number021512
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume33
Issue number2
DOIs
Publication statusPublished - 2015 Mar 1
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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