Thermal Stability of Ni-Fe/Co/Au/Co GMR Pseudo-Spin-Valves |
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Authors: | B. Szymański F. Stobiecki T. Luciński K. Röll |
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Affiliation: | (1) Institute of Molecular Physics, Polish Acad. Sci., ul. Smoluchowskiego 17, 60-179 Pozna, Poland;(2) University of Kassel, Heinrich-Plett Str. 40, 34-132 Kassel, Germany |
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Abstract: | Pseudo-spin-valves (PSV) structures, Ni83Fe17-3 nm / Co-2.5 nm / Au-tAu / Co-2.5 nm, with 2.4tAu3.2 nm were deposited by UHV magnetron sputtering. The weak ferromagnetic coupling J2×10-6 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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Keywords: | giant magnetoresistance spin-valves thermal stability |
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