All-metallic lateral spin valves using Co 2Fe(Ge 0.5Ga 0.5) Heusler alloy with a large spin signal

Y. K. Takahashi; S. Kasai; S. Hirayama; S. Mitani; K. Hono

doi:10.1063/1.3681804

All-metallic lateral spin valves using Co ₂Fe(Ge _0.5Ga _0.5) Heusler alloy with a large spin signal

Y. K. Takahashi^*, S. Kasai, S. Hirayama, S. Mitani, K. Hono

^*Corresponding author for this work

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

74 Citations (Scopus)

Abstract

A large spin signal (ΔR _s) of 12.8 m at room temperature is demonstrated in an all-metallic lateral spin valve (LSV) device comprising of ferromagnetic wire of a highly spin-polarized Co ₂Fe(Ge _0.5Ga _0.5) Heusler alloy and a Cu wire. From the results on multi-terminal LSV devices, the origin of the large ΔR _s was concluded to be the high spin polarization of Co ₂Fe(Ge _0.5Ga _0.5) and the resultant small spin absorption. The all-metallic LSV device without MgO barrier has low contact resistance, which is considered to be beneficial for a high frequency ultrathin read sensor for the next generation ultrahigh density magnetic recording.

Original language	English
Article number	052405
Journal	Applied Physics Letters
Volume	100
Issue number	5
DOIs	https://doi.org/10.1063/1.3681804
Publication status	Published - 2012 Jan 30
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "All-metallic lateral spin valves using Co 2Fe(Ge 0.5Ga 0.5) Heusler alloy with a large spin signal",

abstract = "A large spin signal (ΔR s) of 12.8 m at room temperature is demonstrated in an all-metallic lateral spin valve (LSV) device comprising of ferromagnetic wire of a highly spin-polarized Co 2Fe(Ge 0.5Ga 0.5) Heusler alloy and a Cu wire. From the results on multi-terminal LSV devices, the origin of the large ΔR s was concluded to be the high spin polarization of Co 2Fe(Ge 0.5Ga 0.5) and the resultant small spin absorption. The all-metallic LSV device without MgO barrier has low contact resistance, which is considered to be beneficial for a high frequency ultrathin read sensor for the next generation ultrahigh density magnetic recording.",

author = "Takahashi, {Y. K.} and S. Kasai and S. Hirayama and S. Mitani and K. Hono",

note = "Funding Information: This work was supported in part by PREST-JST and by Grant-in-Aids for Scientific Research (A) (Grant No. 22246091).",

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T1 - All-metallic lateral spin valves using Co 2Fe(Ge 0.5Ga 0.5) Heusler alloy with a large spin signal

AU - Takahashi, Y. K.

AU - Kasai, S.

AU - Hirayama, S.

AU - Mitani, S.

AU - Hono, K.

N1 - Funding Information: This work was supported in part by PREST-JST and by Grant-in-Aids for Scientific Research (A) (Grant No. 22246091).

PY - 2012/1/30

Y1 - 2012/1/30

N2 - A large spin signal (ΔR s) of 12.8 m at room temperature is demonstrated in an all-metallic lateral spin valve (LSV) device comprising of ferromagnetic wire of a highly spin-polarized Co 2Fe(Ge 0.5Ga 0.5) Heusler alloy and a Cu wire. From the results on multi-terminal LSV devices, the origin of the large ΔR s was concluded to be the high spin polarization of Co 2Fe(Ge 0.5Ga 0.5) and the resultant small spin absorption. The all-metallic LSV device without MgO barrier has low contact resistance, which is considered to be beneficial for a high frequency ultrathin read sensor for the next generation ultrahigh density magnetic recording.

AB - A large spin signal (ΔR s) of 12.8 m at room temperature is demonstrated in an all-metallic lateral spin valve (LSV) device comprising of ferromagnetic wire of a highly spin-polarized Co 2Fe(Ge 0.5Ga 0.5) Heusler alloy and a Cu wire. From the results on multi-terminal LSV devices, the origin of the large ΔR s was concluded to be the high spin polarization of Co 2Fe(Ge 0.5Ga 0.5) and the resultant small spin absorption. The all-metallic LSV device without MgO barrier has low contact resistance, which is considered to be beneficial for a high frequency ultrathin read sensor for the next generation ultrahigh density magnetic recording.

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All-metallic lateral spin valves using Co ₂Fe(Ge _0.5Ga _0.5) Heusler alloy with a large spin signal

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