Structure and transport properties of current-perpendicular-to-plane spin valves using Co2FeAl0.5Si0.5 and Co 2MnSi Heusler alloy electrodes

T. Furubayashi; K. Kodama; T. M. Nakatani; H. Sukegawa; Y. K. Takahashi; K. Inomata; K. Hono

doi:10.1063/1.3431530

Structure and transport properties of current-perpendicular-to-plane spin valves using Co₂FeA_l0.5Si_0.5 and Co ₂MnSi Heusler alloy electrodes

T. Furubayashi^*, K. Kodama, T. M. Nakatani, H. Sukegawa, Y. K. Takahashi, K. Inomata, K. Hono

^*Corresponding author for this work

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

7 Citations (Scopus)

Abstract

We report the structure and transport properties of current-perpendicular- to-plane spin valves (CPP SVs) with Co₂FeA_l0.5Si _0.5 (CFAS) or Co₂ MnSi (CMS) Heusler alloy magnetic layers and an Ag or Cu spacer layer. A multilayer stack of sub/Cr/Ag/Heusler/(Ag or Cu)/ Heusler/Co₇₅Fe₂₅/Ir₂₂Mn₇₈/Ru was deposited on a MgO(001) single crystalline substrate by magnetron sputtering. Transmission electron microscopy observations showed epitaxial growth from the substrate to the top Heusler layer. The CPP SV with a CFAS/Ag/CFAS trilayer showed relatively large magnetoresistance (MR) ratios of 12% at room temperature and 31% at 12 K, with monotonous temperature dependence. However, the MR values of the SV with the CMS/Ag/CMS trilayer showed a different temperature dependence with a maximum value of 22% at 100 K. This might be related to the 90° couplings between the two CMS layers.

Original language	English
Article number	113917
Journal	Journal of Applied Physics
Volume	107
Issue number	11
DOIs	https://doi.org/10.1063/1.3431530
Publication status	Published - 2010 Jun 1
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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@article{d22186f129484224be1bfad95313bbb8,

title = "Structure and transport properties of current-perpendicular-to-plane spin valves using Co2FeAl0.5Si0.5 and Co 2MnSi Heusler alloy electrodes",

abstract = "We report the structure and transport properties of current-perpendicular- to-plane spin valves (CPP SVs) with Co2FeAl0.5Si 0.5 (CFAS) or Co2 MnSi (CMS) Heusler alloy magnetic layers and an Ag or Cu spacer layer. A multilayer stack of sub/Cr/Ag/Heusler/(Ag or Cu)/ Heusler/Co75Fe25/Ir22Mn78/Ru was deposited on a MgO(001) single crystalline substrate by magnetron sputtering. Transmission electron microscopy observations showed epitaxial growth from the substrate to the top Heusler layer. The CPP SV with a CFAS/Ag/CFAS trilayer showed relatively large magnetoresistance (MR) ratios of 12% at room temperature and 31% at 12 K, with monotonous temperature dependence. However, the MR values of the SV with the CMS/Ag/CMS trilayer showed a different temperature dependence with a maximum value of 22% at 100 K. This might be related to the 90° couplings between the two CMS layers.",

author = "T. Furubayashi and K. Kodama and Nakatani, {T. M.} and H. Sukegawa and Takahashi, {Y. K.} and K. Inomata and K. Hono",

year = "2010",

month = jun,

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doi = "10.1063/1.3431530",

language = "English",

volume = "107",

journal = "Journal of Applied Physics",

issn = "0021-8979",

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T1 - Structure and transport properties of current-perpendicular-to-plane spin valves using Co2FeAl0.5Si0.5 and Co 2MnSi Heusler alloy electrodes

AU - Furubayashi, T.

AU - Kodama, K.

AU - Nakatani, T. M.

AU - Sukegawa, H.

AU - Takahashi, Y. K.

AU - Inomata, K.

AU - Hono, K.

PY - 2010/6/1

Y1 - 2010/6/1

N2 - We report the structure and transport properties of current-perpendicular- to-plane spin valves (CPP SVs) with Co2FeAl0.5Si 0.5 (CFAS) or Co2 MnSi (CMS) Heusler alloy magnetic layers and an Ag or Cu spacer layer. A multilayer stack of sub/Cr/Ag/Heusler/(Ag or Cu)/ Heusler/Co75Fe25/Ir22Mn78/Ru was deposited on a MgO(001) single crystalline substrate by magnetron sputtering. Transmission electron microscopy observations showed epitaxial growth from the substrate to the top Heusler layer. The CPP SV with a CFAS/Ag/CFAS trilayer showed relatively large magnetoresistance (MR) ratios of 12% at room temperature and 31% at 12 K, with monotonous temperature dependence. However, the MR values of the SV with the CMS/Ag/CMS trilayer showed a different temperature dependence with a maximum value of 22% at 100 K. This might be related to the 90° couplings between the two CMS layers.

AB - We report the structure and transport properties of current-perpendicular- to-plane spin valves (CPP SVs) with Co2FeAl0.5Si 0.5 (CFAS) or Co2 MnSi (CMS) Heusler alloy magnetic layers and an Ag or Cu spacer layer. A multilayer stack of sub/Cr/Ag/Heusler/(Ag or Cu)/ Heusler/Co75Fe25/Ir22Mn78/Ru was deposited on a MgO(001) single crystalline substrate by magnetron sputtering. Transmission electron microscopy observations showed epitaxial growth from the substrate to the top Heusler layer. The CPP SV with a CFAS/Ag/CFAS trilayer showed relatively large magnetoresistance (MR) ratios of 12% at room temperature and 31% at 12 K, with monotonous temperature dependence. However, the MR values of the SV with the CMS/Ag/CMS trilayer showed a different temperature dependence with a maximum value of 22% at 100 K. This might be related to the 90° couplings between the two CMS layers.

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Structure and transport properties of current-perpendicular-to-plane spin valves using Co₂FeA_l0.5Si_0.5 and Co ₂MnSi Heusler alloy electrodes

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