The effect of film and interface structure on the transport properties of Heusler based current-perpendicular-to-plane spin valves

V. K. Lazarov, K. Yoshida, J. Sato, P. J. Hasnip, M. Oogane, A. Hirohata, Y. Ando

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

We present direct link between the transport properties of Co2 MnSi and Co2 FeMnSi Heusler based current-perpendicular-to-plane spin valves (CPP-SVs) and interface atomic structures resolved by aberration-corrected electron microscopy. The structure of the Co2 FeMnSi electrodes is L21 but their interface with the CoSi spacer is disordered. In contrast to the Co2 FeMnSi -electrodes, the Co 2 MnSi -electrodes have abrupt interfaces with the Ag spacer though their ordering is not fully L21. The magnetoresistance of the Co 2 MnSi-SV is over two orders of magnitude better than those of Co2 FeMnSi-SV, demonstrating that the atomic interface ordering is crucial for the enhancement of the magnetoresistance in the Heusler CPP-SVs.

Original languageEnglish
Article number242508
JournalApplied Physics Letters
Volume98
Issue number24
DOIs
Publication statusPublished - 2011 Jun 13

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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