Enhancement of magnetoresistance using CoFe/Ru/CoFe synthetic ferrimagnetic pinned layer in BiFeO 3 based spin-valves

Hiroshi Naganuma, In Tae Bae, Takamichi Miyazaki, Miho Kubota, Nobuhito Inami, Yuki Kawada, Mikihiko Oogane, Shigemi Mizukami, X. F. Han, Yasuo Ando

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

SrTiO 3 (100) sub/BiFeO 3/CoFe/Ru/CoFe/Cu/CoFe/Ta structure was prepared by a combination of chemical solution deposition and sputtering method, and followed by a systematical investigation for the structural, magnetic and magnetoresistance properties at room temperature (RT) as a function of CoFe and Ru thicknesses. It was revealed that introduction of synthetic CoFe/Ru/CoFe as a pinning layer increased the giant magentoresistance (MR) ratio to 8.3 at RT. This enhancement of MR ratio might be attributed to (i) the increase of pinning field, and (ii) suppression of the influence of the surface roughness of BiFeO 3 by inserting the synthetic CoFe/Ru/CoFe layer.

Original languageEnglish
Article number072901
JournalApplied Physics Letters
Volume101
Issue number7
DOIs
Publication statusPublished - 2012 Aug 13

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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