Pressure dependence of magnetoresistance for Fe/Cr multilayers

K. Suenaga, S. Higashihara, G. Oomi, K. Saito, S. Mitani, Koki Takanashi

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The magnetoresistance (MR) in Fe/Cr magnetic multilayers (MML) has been measured under high pressure up to 2.5 GPa. It is found that the spin-dependent scattering plays an important role in the pressure dependence of MR ratio. In the present work, for [Fe(20 Å)/Cr(10 Å)]20 MML with antiferromagnetic (AF) state, the pressure coefficient of saturation field Hs is (1/Hs)(part;Hs/dP) = 3.3 × 10 -2 GPa-1 between 0.1 and 2.5 GPa. We found that the (1/|J|)(∂|J|/∂P) for AF-Fe/Cr MML with polycrystalline structure is opposite in sign to that with epitaxial one. For [Fe(20 Å)/Cr(22 Å)]20 MML with ferromagnetic (F) state, anisotropic magnetoresistance (AMR) decreases with increasing pressure. It is suggested that the anisotropy constant decreases with weakening spin-orbit interaction at high pressure. At high field, the AMR is easily suppressed by applying pressure while the giant magnetoresistance around Hs increases slightly with increasing pressure for polycrystalline Fe/Cr MML.

Original languageEnglish
Pages (from-to)1499-1502
Number of pages4
JournalIEEE Transactions on Magnetics
Volume42
Issue number5
DOIs
Publication statusPublished - 2006 May 1

Keywords

  • Giant magnetoresistance
  • Multilayers
  • Pressure effects
  • Superlattices
  • Thin films

ASJC Scopus subject areas

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

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