Effect of pressure on the tunnel magnetoresistance of Co-Al-O granular films

S. Kaji, G. Oomi, S. Mitani, K. Takanashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We have measured electrical resistivity and magnetoresistance of Co 52Al20O28 insulating granular film under high pressure. It is found that the temperature dependence of electrical resistivity ρ(T) is affected strongly by applying pressure. The results suggest a metallic conductivity at high pressure. Furthermore the tunnel magnetoresistance (TMR) is enhanced by more than 2% at 3.1 GPa and 4.2 K, while no enhancement is observed at 77 K and r.t.

Original languageEnglish
Pages (from-to)1829-1830
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume272-276
Issue numberIII
DOIs
Publication statusPublished - 2004 May

Keywords

  • Granular material
  • Pressure effect
  • Tunnel magnetoresistance

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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