Magnetic properties optimization for amorphous soft under layers

C. Zhang, N. Amos, R. Fernandez, J. Hong, B. Hu, S. Khizroev

Research output: Contribution to journalArticlepeer-review


Magneto-optical Kerr effect (MOKE) microscopy and vibrating sample magnetometer (VSM) were used to investigate the magnetic properties of CoFeTaZr and CoTaZr soft magnetic underlayers (SULs). When comparing the CoTaZr with the CoFeTaZr amorphous thin films, the CoFeTaZr films yielded superior magnetic properties. Pre-sputtering substrate Ar-ion milling and sputtering processing pressure were varied to control the magnetic properties of the amorphous films. Furthermore, it was discovered that the magnetic properties of the amorphous thin film strongly depended on the thickness of the SULs, seed layers and capping layers. The experimental results indicated that above a certain thickness, the media noise could be substantially reduced and the magnetic properties of the CoFeTaZr SULs would be optimized. It was also shown that CoFeTaZr SULs with a Ta capping layer and Ru seedlayer had lower coercivity.

Original languageEnglish (US)
Pages (from-to)13-19
Number of pages7
JournalJournal of Nanoelectronics and Optoelectronics
Issue number1
StatePublished - Apr 2010
Externally publishedYes


  • CoFeTaZr
  • CoTaZr
  • Soft magnetic materials
  • Soft underlayers

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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