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- W1984172316 abstract "We have investigated a tunnel magnetoresistance (TMR) ratio of CoFeB/MgO perpendicular magnetic tunnel junctions (p-MTJs) with a 40 nm diameter as a function of an annealing temperature Ta. The TMR ratio at room temperature (RT) increases with increasing Ta and reaches 149% at Ta = 350 °C, and further increase of Ta results in a strong reduction of the TMR ratio, i.e., 2% at Ta = 400 °C. The temperature dependence of the junction resistance versus magnetic field loops reveals that the reduced TMR ratio at RT is due to the disappearance of a stable antiparallel magnetization configuration. We find that reduction of dipole coupling restores the TMR ratio." @default.
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- W1984172316 date "2011-12-19" @default.
- W1984172316 modified "2023-10-16" @default.
- W1984172316 title "Origin of the collapse of tunnel magnetoresistance at high annealing temperature in CoFeB/MgO perpendicular magnetic tunnel junctions" @default.
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- W1984172316 doi "https://doi.org/10.1063/1.3671669" @default.
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