Thermal stability of spin valve with NiO/α-Fe2O3 bilayer antiferromagnets

Junichi Fujikata, Kazuhiko Hayashi, Mikiko Saito, Masafumi Nakada

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

To enhance the thermal stability of the NiO pinning layers for spin valves, α -Fe2O3 layers, of which the Neel temperature is 680°C for bulk, are deposited on NiO layers. With 15-80 Å thick α-Fe2O3 layers on NiO layers, an exchange anisotropy field about five times larger than that of NiO/NiFe is obtained after 250°C thermal annealing. Spin valve multilayers with NiO/α-Fe2O3 antiferromagnets show about 12% MR ratio. After 150°C annealing, MR ratio changes less than 20% for patterned spin valve multilayers with abutted junctioned hard magnets.

Original languageEnglish
Pages (from-to)954-956
Number of pages3
JournalIEEE Transactions on Magnetics
Volume34
Issue number4 PART 1
DOIs
Publication statusPublished - 1998 Dec 1
Externally publishedYes

Keywords

  • Nio, spin valve
  • Thermal stability
  • α-feo

ASJC Scopus subject areas

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

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