Annealing effect on interlayer exchange coupling in perpendicularly magnetized synthetic antiferromagnetic structure based on Co/Pd multilayers with ultrathin Ru spacer

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Abstract

Perpendicularly magnetized synthetic antiferromagnetic (p-SAF) structures exhibiting large exchange field (Hex) values have been widely studied for application to spintronic devices. We investigated magnetic properties of p-SAF structures based on Co/Pd multilayers with an ultrathin Ru spacer at various annealing temperatures (Ta). The [Co/Pd]-based p-SAF structures exhibited large Hex values of the order of kOe up to Ta = 350 °C. We clarified that Hex in the p-SAF structures significantly degrades with increasing Ta mainly owing to a marked reduction in exchange coupling energy (Jex). These results demonstrate that [Co/Pd]-based p-SAF structures exhibit sufficiently large Hex values for device applications and that the annealing stability is predominantly determined by Jex.

Original languageEnglish
Article number073001
JournalJapanese journal of applied physics
Volume57
Issue number7
DOIs
Publication statusPublished - 2018 Jul

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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