Enhancement of current-perpendicular-to-plane giant magnetoresistance in Heusler-alloy based pseudo spin valves by using a CuZn spacer layer

T. Furubayashi; Y. K. Takahashi; T. T. Sasaki; K. Hono

doi:10.1063/1.4933397

Enhancement of current-perpendicular-to-plane giant magnetoresistance in Heusler-alloy based pseudo spin valves by using a CuZn spacer layer

T. Furubayashi, Y. K. Takahashi, T. T. Sasaki, K. Hono

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

6 Citations (Scopus)

Abstract

Enhancement of magnetoresistance output was attained in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices by using a bcc CuZn alloy for the spacer. Pseudo spin valves that consisted of the Co₂Fe(Ga_0.5Ge_0.5) Heusler alloy for ferromagnetic layers and CuZn alloy with the composition of Cu_52.4Zn_47.6 for a spacer showed the large change of the resistance-area products, ΔRA, up to 8 mΩï¿½μm² for a low annealing temperature of 350 ï¿½C. The ΔRA value is one of the highest reported so far for the CPP-GMR devices for the low annealing temperature, which is essential for processing read heads for hard disk drives. We consider that the enhancement of ΔRA is produced from the spin-dependent resistance at the Co₂Fe(Ga_0.5Ge_0.5)/CuZn interfaces.

Original language	English
Article number	163901
Journal	Journal of Applied Physics
Volume	118
Issue number	16
DOIs	https://doi.org/10.1063/1.4933397
Publication status	Published - 2015 Oct 28
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Enhancement of current-perpendicular-to-plane giant magnetoresistance in Heusler-alloy based pseudo spin valves by using a CuZn spacer layer",

abstract = "Enhancement of magnetoresistance output was attained in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices by using a bcc CuZn alloy for the spacer. Pseudo spin valves that consisted of the Co2Fe(Ga0.5Ge0.5) Heusler alloy for ferromagnetic layers and CuZn alloy with the composition of Cu52.4Zn47.6 for a spacer showed the large change of the resistance-area products, ΔRA, up to 8 mΩ{\"i}¿½μm2 for a low annealing temperature of 350 {\"i}¿½C. The ΔRA value is one of the highest reported so far for the CPP-GMR devices for the low annealing temperature, which is essential for processing read heads for hard disk drives. We consider that the enhancement of ΔRA is produced from the spin-dependent resistance at the Co2Fe(Ga0.5Ge0.5)/CuZn interfaces.",

author = "T. Furubayashi and Takahashi, {Y. K.} and Sasaki, {T. T.} and K. Hono",

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AU - Furubayashi, T.

AU - Takahashi, Y. K.

AU - Sasaki, T. T.

AU - Hono, K.

PY - 2015/10/28

Y1 - 2015/10/28

N2 - Enhancement of magnetoresistance output was attained in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices by using a bcc CuZn alloy for the spacer. Pseudo spin valves that consisted of the Co2Fe(Ga0.5Ge0.5) Heusler alloy for ferromagnetic layers and CuZn alloy with the composition of Cu52.4Zn47.6 for a spacer showed the large change of the resistance-area products, ΔRA, up to 8 mΩï¿½μm2 for a low annealing temperature of 350 ï¿½C. The ΔRA value is one of the highest reported so far for the CPP-GMR devices for the low annealing temperature, which is essential for processing read heads for hard disk drives. We consider that the enhancement of ΔRA is produced from the spin-dependent resistance at the Co2Fe(Ga0.5Ge0.5)/CuZn interfaces.

AB - Enhancement of magnetoresistance output was attained in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices by using a bcc CuZn alloy for the spacer. Pseudo spin valves that consisted of the Co2Fe(Ga0.5Ge0.5) Heusler alloy for ferromagnetic layers and CuZn alloy with the composition of Cu52.4Zn47.6 for a spacer showed the large change of the resistance-area products, ΔRA, up to 8 mΩï¿½μm2 for a low annealing temperature of 350 ï¿½C. The ΔRA value is one of the highest reported so far for the CPP-GMR devices for the low annealing temperature, which is essential for processing read heads for hard disk drives. We consider that the enhancement of ΔRA is produced from the spin-dependent resistance at the Co2Fe(Ga0.5Ge0.5)/CuZn interfaces.

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Enhancement of current-perpendicular-to-plane giant magnetoresistance in Heusler-alloy based pseudo spin valves by using a CuZn spacer layer

Abstract

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