Magnetic properties of spin valves with antiferromagnetic CrMnPt deposited at various Ar pressures

Gi Back Park, Jin Oh Song, Seong Rae Lee

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Abstract

The dependence of the giant magnetoresistance (MR) ratio and exchange bias field (Hex) on the argon deposition pressure (PAr) of antiferromagnetic CrMnPt film for top spin valves was investigated. The MR ratio was enhanced from 5.0% to 8.3% as the PAr of CrMnPt film increased from 2 to 15 mTorr. Hex also increased from 150 to 300 Oe. These significant enhancements in the magnetic properties were correlated with microstructural changes and body-centered-tetragonal (bct) phase change reaction in the antiferromagnetic film. The bct phase change was promoted at high PAr because of the microstructural defects. The blocking temperature (TB) and the exchange anisotropy energy (Jex) were higher at high PAr owing to the promotion of bct phase change.

Original languageEnglish
Article number10N701
JournalJournal of Applied Physics
Volume97
Issue number10
DOIs
Publication statusPublished - 2005 May 15

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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