Large interface spin-asymmetry and magnetoresistance in fully epitaxial Co2MnSi/Ag/Co2MnSi current-perpendicular-to-plane magnetoresistive devices

Taku Iwase, Yuya Sakuraba, Subrojati Bosu, Kesami Saito, Seiji Mitani, Koki Takanashi

Research output: Contribution to journalArticle

128 Citations (Scopus)

Abstract

Current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) characteristics were investigated in a Co2MnSi (CMS)/Ag/CMS fully epitaxial device and compared to those in a CMS/Cr/CMS device systematically. Reflection high-energy electron diffraction and transmission electron microscopy images showed the two samples had no remarkable differences and little interdiffusion. The large spinasymmetry of electron scattering was found at the CMS/Ag inteface compared with that at the CMS/Cr interface. Finally, the largest magneto-resistance (MR) ratio of 28.8% was observed at room temperature in the CMS/Ag/CMS CPP-GMR device.

Original languageEnglish
Article number063003
JournalApplied Physics Express
Volume2
Issue number6
DOIs
Publication statusPublished - 2009 Jun 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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