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Thermal Stability of Ni-Fe/Co/Au/Co GMR Pseudo-Spin-Valves

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Czechoslovak Journal of Physics Aims and scope

Abstract

Pseudo-spin-valves (PSV) structures, Ni83Fe17-3 nm / Co-2.5 nm / Au-t Au / Co-2.5 nm, with 2.4≤t Au≤3.2 nm were deposited by UHV magnetron sputtering. The weak ferromagnetic coupling J≈2×10-6 J/m2 between Ni-Fe/Co and Co layers and GMR effect ≈ 3% was found at RT. The GMR amplitude decreases monotonically from 5% at -100°C to 1% at 200°C. However, the slope of R(H) curve, i.e., GMR field sensitivity, is equal to about 1.5%/Oe and remains almost constant in the entire investigated temperature range. Additionally, our PSV display a good thermal stability, with no significant changes of magnetic and transport properties after annealing up to 250°C.

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Szymański, B., Stobiecki, F., Luciński, T. et al. Thermal Stability of Ni-Fe/Co/Au/Co GMR Pseudo-Spin-Valves. Czechoslovak Journal of Physics 52, 235–238 (2002). https://doi.org/10.1023/A:1014479931305

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  • DOI: https://doi.org/10.1023/A:1014479931305

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