001 textured polycrystalline current-perpendicular-to-plane pseudo spin-valves using Co2Fe(Ga0.5Ge0.5) Heusler alloy

Ye Du; B. S.D.Ch S. Varaprasad; Y. K. Takahashi; T. Furubayashi; K. Hono

doi:10.1063/1.4829633

001 textured polycrystalline current-perpendicular-to-plane pseudo spin-valves using Co₂Fe(Ga_0.5Ge_0.5) Heusler alloy

Ye Du, B. S.D.Ch S. Varaprasad, Y. K. Takahashi, T. Furubayashi, K. Hono^*

^*Corresponding author for this work

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

29 Citations (Scopus)

Abstract

The orientation dependence of current-perpendicular-to-plane giant-magnetoresistance (CPP-GMR) was investigated by fabricating 001 textured polycrystalline pseudo spin valves (PSVs) with Co₂Fe(Ga _0.5Ge_0.5) (CFGG) Heusler alloy ferromagnetic layers and a Ag spacer. The PSV with 10 nm CFGG annealed at 400°C exhibited the resistance-change area product (ΔRA) of 5.8 mΩ (MR ratio of 16%), the largest value reported for polycrystalline CPP-(P)SVs. The 001 textured CFGG PSV outperforms the 011 textured CFGG PSV possibly due to the reduced lattice mismatch or improved band matching at the CFGG/Ag interface.

Original language	English
Article number	202401
Journal	Applied Physics Letters
Volume	103
Issue number	20
DOIs	https://doi.org/10.1063/1.4829633
Publication status	Published - 2013 Nov 11
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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@article{f97878ad8a7a4f878dad678ab378f464,

title = "001 textured polycrystalline current-perpendicular-to-plane pseudo spin-valves using Co2Fe(Ga0.5Ge0.5) Heusler alloy",

abstract = "The orientation dependence of current-perpendicular-to-plane giant-magnetoresistance (CPP-GMR) was investigated by fabricating 001 textured polycrystalline pseudo spin valves (PSVs) with Co2Fe(Ga 0.5Ge0.5) (CFGG) Heusler alloy ferromagnetic layers and a Ag spacer. The PSV with 10 nm CFGG annealed at 400°C exhibited the resistance-change area product (ΔRA) of 5.8 mΩ (MR ratio of 16%), the largest value reported for polycrystalline CPP-(P)SVs. The 001 textured CFGG PSV outperforms the 011 textured CFGG PSV possibly due to the reduced lattice mismatch or improved band matching at the CFGG/Ag interface.",

author = "Ye Du and Varaprasad, {B. S.D.Ch S.} and Takahashi, {Y. K.} and T. Furubayashi and K. Hono",

note = "Funding Information: Y.D. is grateful for the useful discussions with Dr. S. Li on the annealing procedure and technical advices from Dr. Z. C. Wen about sputtering. Y.D. acknowledges the National Institute for Materials Science (NIMS) for the provision of Junior Research Assistantship. This work was in part supported by the Grant-in-aid for Scientific Research (A) (Grant Nos. 22246091 and 25249087) and Advanced Storage Technology Consortium (ASTC), IDEMA.",

year = "2013",

month = nov,

day = "11",

doi = "10.1063/1.4829633",

language = "English",

volume = "103",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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T1 - 001 textured polycrystalline current-perpendicular-to-plane pseudo spin-valves using Co2Fe(Ga0.5Ge0.5) Heusler alloy

AU - Du, Ye

AU - Varaprasad, B. S.D.Ch S.

AU - Takahashi, Y. K.

AU - Furubayashi, T.

AU - Hono, K.

N1 - Funding Information: Y.D. is grateful for the useful discussions with Dr. S. Li on the annealing procedure and technical advices from Dr. Z. C. Wen about sputtering. Y.D. acknowledges the National Institute for Materials Science (NIMS) for the provision of Junior Research Assistantship. This work was in part supported by the Grant-in-aid for Scientific Research (A) (Grant Nos. 22246091 and 25249087) and Advanced Storage Technology Consortium (ASTC), IDEMA.

PY - 2013/11/11

Y1 - 2013/11/11

N2 - The orientation dependence of current-perpendicular-to-plane giant-magnetoresistance (CPP-GMR) was investigated by fabricating 001 textured polycrystalline pseudo spin valves (PSVs) with Co2Fe(Ga 0.5Ge0.5) (CFGG) Heusler alloy ferromagnetic layers and a Ag spacer. The PSV with 10 nm CFGG annealed at 400°C exhibited the resistance-change area product (ΔRA) of 5.8 mΩ (MR ratio of 16%), the largest value reported for polycrystalline CPP-(P)SVs. The 001 textured CFGG PSV outperforms the 011 textured CFGG PSV possibly due to the reduced lattice mismatch or improved band matching at the CFGG/Ag interface.

AB - The orientation dependence of current-perpendicular-to-plane giant-magnetoresistance (CPP-GMR) was investigated by fabricating 001 textured polycrystalline pseudo spin valves (PSVs) with Co2Fe(Ga 0.5Ge0.5) (CFGG) Heusler alloy ferromagnetic layers and a Ag spacer. The PSV with 10 nm CFGG annealed at 400°C exhibited the resistance-change area product (ΔRA) of 5.8 mΩ (MR ratio of 16%), the largest value reported for polycrystalline CPP-(P)SVs. The 001 textured CFGG PSV outperforms the 011 textured CFGG PSV possibly due to the reduced lattice mismatch or improved band matching at the CFGG/Ag interface.

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JF - Applied Physics Letters

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ER -

001 textured polycrystalline current-perpendicular-to-plane pseudo spin-valves using Co₂Fe(Ga_0.5Ge_0.5) Heusler alloy

Abstract

ASJC Scopus subject areas

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