Pressure enhanced tunnel magnetoresistance in Co-Al-O granular films

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

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Effects of high pressure on tunnel transport and magnetoresistance have been investigated in Co52Al20O28 insulating granular films. It is found that the temperature dependence of electrical resistivity ρ(T) is affected strongly by applying pressure while the T−1/2 dependence in ρ(T) is still observed at high pressures. Furthermore, tunnel magnetoresistance is enhanced by more than 2% at 3.1 GPa. The results are discussed briefly on the basis of higher-order tunneling theory.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number5
DOIs
Publication statusPublished - 2003 Aug 5

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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