The influence of grain morphology and easy axis orientation on the coercivity of Sm(Co0.9Cu0.1)5 thin films

W. B. Cui, L. Ma, H. Sepehri-Amin, Y. K. Takahashi, K. Hono

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Sm(Co0.9Cu0.1)5 single-layer thin films and Sm(Co0.9Cu0.1)5/Fe2Co exchange coupled bilayer films with c-axis in the plane (IP) and out of the plane (OOP) orientations were prepared on MgO and Al2O3 single crystalline substrates by magnetron sputtering. Clear relationship between the grain morphology and coercivity was observed for the Sm(Co0.9Cu0.1)5 single-layer films. We found the thermal stability of coercivity is largely influenced by the c-axis orientation because the c-axis IP geometry lowers magnetostatic effect that plays an increasing role at elevated temperature. In Sm(Co0.9Cu0.1)5/Fe2Co bilayer films with the two c-axis geometries, the coercivity show larger dependence on the thickness of the Fe2Co layer for the c-axis IP geometry due to the energetically unfavorable magnetostatic coupling between hard/soft-magnetic layers, which is supported by micromagnetic simulations.

Original languageEnglish
Pages (from-to)49-58
Number of pages10
JournalActa Materialia
Volume107
DOIs
Publication statusPublished - 2016 Apr 1
Externally publishedYes

Keywords

  • Coercivity
  • Micromagnetic
  • Permanet magnet
  • SmCo
  • Thin film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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