Magnetoresistance and interlayer coupling in Co-Pt/Cu/Permalloy sandwiches

Kazuteru Kato, Osamu Kitakami, Yutaka Shimada

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Addition of a small amount of Pt greatly enhances the magnetic hardness of Co films. By combining this hard Co94.5Pt5.5 film with a soft permalloy film, we prepared Co-Pt/Cu/permalloy sandwiches, and investigated their magnetoresistance and the interlayer coupling between the two magnetic layers. The sandwiches exhibited large magnetoresistance of up to 4.4% without any buffer underlayers, although the magnetization reversal field of the permalloy layer was increased due to the ferromagnetic interlayer coupling with a Со-Pt layer. In order to reduce the coupling, the interfacial roughness in the sandwiches and the magnetization fluctuations in each magnetic layer must be reduced.

Original languageEnglish
Pages (from-to)492-496
Number of pages5
JournalJapanese journal of applied physics
Issue number2R
Publication statusPublished - 1995 Feb
Externally publishedYes


  • Co-Pt alloy
  • Magnetic interlayer
  • Magnetization reversal field
  • Magnetoresistance
  • Permalloy
  • Sandwich

ASJC Scopus subject areas

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


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