Magneto-transport and microstructure of Co2Fe(Ga 0.5Ge0.5)/Cu lateral spin valves prepared by top-down microfabrication process

I. Ikhtiar; S. Kasai; A. Itoh; Y. K. Takahashi; T. Ohkubo; S. Mitani; K. Hono

doi:10.1063/1.4874936

Magneto-transport and microstructure of Co₂Fe(Ga _0.5Ge_0.5)/Cu lateral spin valves prepared by top-down microfabrication process

I. Ikhtiar, S. Kasai, A. Itoh, Y. K. Takahashi, T. Ohkubo, S. Mitani, K. Hono^*

^*Corresponding author for this work

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

33 Citations (Scopus)

Abstract

Heusler alloy-based lateral spin valves with ohmic contacts are prepared for the Co₂Fe(Ga_0.5Ge_0.5)/Cu system by means of the top-down microfabrication process. The magneto-transport and microstructure are characterized to investigate the influence of the microfabrication route on the spin dependent transport of lateral spin valves systematically. A large non-local spin signal (?R_S) of 17.3mΩ is observed at room temperature, which is attributed to the highly spin-polarized Co ₂Fe(Ga_0.5Ge_0.5) ferromagnet and the clean Co₂Fe(Ga_0.5Ge_0.5)/Cu interfaces confirmed by transmission electron microscopy. Based on the general expression of one-dimensional spin diffusion model, we discuss the importance of interfacial spin polarization in Heusler alloy-based lateral spin valves.

Original language	English
Article number	173912
Journal	Journal of Applied Physics
Volume	115
Issue number	17
DOIs	https://doi.org/10.1063/1.4874936
Publication status	Published - 2014 May 7
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Magneto-transport and microstructure of Co2Fe(Ga 0.5Ge0.5)/Cu lateral spin valves prepared by top-down microfabrication process",

abstract = "Heusler alloy-based lateral spin valves with ohmic contacts are prepared for the Co2Fe(Ga0.5Ge0.5)/Cu system by means of the top-down microfabrication process. The magneto-transport and microstructure are characterized to investigate the influence of the microfabrication route on the spin dependent transport of lateral spin valves systematically. A large non-local spin signal (?RS) of 17.3mΩ is observed at room temperature, which is attributed to the highly spin-polarized Co 2Fe(Ga0.5Ge0.5) ferromagnet and the clean Co2Fe(Ga0.5Ge0.5)/Cu interfaces confirmed by transmission electron microscopy. Based on the general expression of one-dimensional spin diffusion model, we discuss the importance of interfacial spin polarization in Heusler alloy-based lateral spin valves.",

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AU - Ikhtiar, I.

AU - Kasai, S.

AU - Itoh, A.

AU - Takahashi, Y. K.

AU - Ohkubo, T.

AU - Mitani, S.

AU - Hono, K.

PY - 2014/5/7

Y1 - 2014/5/7

N2 - Heusler alloy-based lateral spin valves with ohmic contacts are prepared for the Co2Fe(Ga0.5Ge0.5)/Cu system by means of the top-down microfabrication process. The magneto-transport and microstructure are characterized to investigate the influence of the microfabrication route on the spin dependent transport of lateral spin valves systematically. A large non-local spin signal (?RS) of 17.3mΩ is observed at room temperature, which is attributed to the highly spin-polarized Co 2Fe(Ga0.5Ge0.5) ferromagnet and the clean Co2Fe(Ga0.5Ge0.5)/Cu interfaces confirmed by transmission electron microscopy. Based on the general expression of one-dimensional spin diffusion model, we discuss the importance of interfacial spin polarization in Heusler alloy-based lateral spin valves.

AB - Heusler alloy-based lateral spin valves with ohmic contacts are prepared for the Co2Fe(Ga0.5Ge0.5)/Cu system by means of the top-down microfabrication process. The magneto-transport and microstructure are characterized to investigate the influence of the microfabrication route on the spin dependent transport of lateral spin valves systematically. A large non-local spin signal (?RS) of 17.3mΩ is observed at room temperature, which is attributed to the highly spin-polarized Co 2Fe(Ga0.5Ge0.5) ferromagnet and the clean Co2Fe(Ga0.5Ge0.5)/Cu interfaces confirmed by transmission electron microscopy. Based on the general expression of one-dimensional spin diffusion model, we discuss the importance of interfacial spin polarization in Heusler alloy-based lateral spin valves.

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Magneto-transport and microstructure of Co₂Fe(Ga _0.5Ge_0.5)/Cu lateral spin valves prepared by top-down microfabrication process

Abstract

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