Effect of pressure on the giant magnetoresistance in Co/Cu magnetic multilayers

Kazufumi Suenaga, Gendo Oomi, Takeshi Sakai, Kesami Saito, Koki Takanashi, Hiroyasu Fujimori

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

The effect of pressure and magnetic field on the temperature dependent electrical resistivity ρ(T) of the [Co(1.02nm)/Cu(t cu nm)] 25 magnetic multilayers (MML) with t Cu = 0.76 [ferromagnetic (F)] and 1.05 [antiferromagnetic (AF)] has been investigated at low temperature. MR ratio Δρ/ρ s for t Cu = 1.05 and 0.76 decreases with increasing pressure. The pressure dependent Δρ/ρ s for t Cu = 1.05 is more significant than that for 0.76. ρ(T) at H = 0 and above saturation field H S (H = 2 T) for Co/Cu MMLs is found to show T 2-dependence in the relatively wide temperature range, 4.2 ≤ T ≤ 20 K, at low temperature. The coefficient of T 2 term (= A) for F-state is larger than that for AF-state at ambient pressure. The change of A for t Cu = 1.05 at H = 0 is smaller than that at H = 2T. These results are discussed on the basis of the electron scattering at interfaces due to magnons or spin-wave.

Original languageEnglish
Article number024702
Journaljournal of the physical society of japan
Volume75
Issue number2
DOIs
Publication statusPublished - 2006 Feb

Keywords

  • Co/Cu magnetic multilayer
  • Giant magnetoresistance
  • High pressure
  • Spin-dependent scattering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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