Effect of pressure on the spin-dependence of electrical resistivity in Fe/Cr magnetic multilayers

Gendo Oomi, Kazufumi Suenaga, Shuhei Higashihara, Kesami Saito, Seiji Mitani, Koki Takanashi

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The electrical resistivities of Fe/Cr magnetic multilayers have been measured at a high pressure and magnetic field. The electrical resistivity shows a large decrease by applying a magnetic field, indicating giant magnetoresistance (GMR). GMR decreases but the saturation field increases with increasing pressure. The spin-dependence of electrical resistivities due to the scattering of conduction electrons with spins parallel (ρ+) and antiparallel (ρ-) to the Fe layer magnetization are extracted. The pressure dependence of ρ+ is greater than that of ρ-. The origins of the pressure dependence of ρ+ and ρ- are discussed on the basis of theoretical model, and the large pressure coefficients for ρ+ and ρ- are suggested to be mainly due to a change in the random exchange potential at interfaces. A small minimum in the temperature-dependence of resistivity is induced by applying pressure. ρ+ decreases but ρ- increases with increasing temperature up to 40 K. The anomalous temperature-dependence of resistivities is discussed in connection with a Kondo-like effect.

Original languageEnglish
Article number054711
Journaljournal of the physical society of japan
Volume79
Issue number5
DOIs
Publication statusPublished - 2010 May 1

Keywords

  • Fe/Cr magnetic multilayer
  • Giant magnetoresistance
  • High pressure
  • Kondo effect
  • Spin dependent scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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