Physics – Condensed Matter – Materials Science
Scientific paper
2010-07-22
D. Herranz, F. Bonell, A.Gomez-Ibarlucea, S. Andrieu, F. Montaigne, R.Villar1, C.Tiusan , and F.G.Aliev Appl. Phys. Lett. 96,
Physics
Condensed Matter
Materials Science
12 pages, 3 figures
Scientific paper
Alloying Fe electrodes with V, through reduced FeV/MgO interface mismatch in epitaxial magnetic tunnel junctions with MgO barriers, notably suppresses both nonmagnetic (parallel) and magnetic (antiparallel) state 1/f noise and enhances tunnelling magnetoresistance (TMR). A comparative study of the room temperature electron transport and low frequency noise in Fe1-xVx/MgO/Fe and Fe/MgO/Fe1-xVx MTJs with 0 <= x <= 0.25 reveals that V doping of the bottom electrode for x < 0.1 reduces in nearly 2 orders of magnitude the normalized nonmagnetic and magnetic 1/f noise. We attribute the enhanced TMR and suppressed 1/f noise to strongly reduced misfit and dislocation density.
Aliev Farkhad G.
Andrieu Stéphane
Bonell F.
Gomez-Ibarlucea A.
Herranz Diego
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