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

doi:10.1143/APEX.2.063003

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

Materials Development Division

Research output: Contribution to journal › Article › peer-review

133 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 language	English
Article number	063003
Journal	Applied Physics Express
Volume	2
Issue number	6
DOIs	https://doi.org/10.1143/APEX.2.063003
Publication status	Published - 2009 Jun 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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Large interface spin-asymmetry and magnetoresistance in fully epitaxial Co₂MnSi/Ag/Co₂MnSi current-perpendicular-to-plane magnetoresistive devices. / Iwase, Taku; Sakuraba, Yuya; Bosu, Subrojati; Saito, Kesami; Mitani, Seiji; Takanashi, Koki.

In: Applied Physics Express, Vol. 2, No. 6, 063003, 01.06.2009.

Research output: Contribution to journal › Article › peer-review

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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.",

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AU - Takanashi, Koki

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