Magnetic Properties and Microstructure of TbFeCoAg Amorphous Thin Films

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Published 9 May 2006 • Copyright (c) 2006 The Japan Society of Applied Physics
, , Citation Chun-Yuan Chou et al 2006 Jpn. J. Appl. Phys. 45 4021 DOI 10.1143/JJAP.45.4021

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Author affiliations

1 Institute of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan

2 Center for Nanostorage Research, National Taiwan University, Taipei 106, Taiwan

3 Institute of Physics, Academia Sinica, Taipei 115, Taiwan

4 Department of Materials Engineering, MingChi University of Technology, Taipei 243, Taiwan

Dates

  1. Received 16 March 2005
  2. Accepted 15 February 2006
  3. Published

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Abstract

The effect of Ag content on the magnetic properties and microstructure of Tb19.05Fe22.01Co58.94-xAgx film (x=0–18.51 at. %) were investigated. As judged from X-ray diffraction and transmission electron microscopy analyses, as-deposited Tb19.05Fe22.01Co58.94-xAgx films were amorphous. It was found that the addition of a small amount of the nonmagnetic element Ag into TbFeCo increases the saturation magnetization (Ms) and perpendicular coercivity (Hc⊥) of the film. For a Tb19.05Fe22.01Co55.75Ag3.19 film, the Ms is 268 emu/cm3, the perpendicular squareness is 0.94 and the Hc⊥ is 2058 Oe at room temperature. The Hc⊥ of the Tb19.05Fe22.01Co55.75Ag3.19 film decreases to approximately 40 Oe as temperature is increased to 200 °C. This film has potential for heat-assisted magnetic recording media applications.

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10.1143/JJAP.45.4021