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High temperature annealing induced superparamagnetism in CoFeB/MgO/CoFeB tunneling junctions
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10.1063/1.3496663
/content/aip/journal/jap/108/8/10.1063/1.3496663
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/8/10.1063/1.3496663
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

TMR ratio and coercivity as a function of annealing time for a single MTJ junction annealed at .

Image of FIG. 2.
FIG. 2.

Measured MR loops of a MTJ junction annealed for different times at .

Image of FIG. 3.
FIG. 3.

The linear region in MR loops as a function of annealing time. The TMR ratios are also labeled.

Image of FIG. 4.
FIG. 4.

Measured MR loops of an MTJ junction annealed for 20 min at , is the angle between the applied magnetic field and the pinning direction. The solid line is the fitting based on the superparamagnetism theory.

Image of FIG. 5.
FIG. 5.

Conductances in parallel and antiparallel states as a function of annealing time for the MTJ used in Fig. 1 annealed at . The inserted picture shows the I–V curves of another MTJ junction annealed at the same temperature for 1 and 40 min.

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/content/aip/journal/jap/108/8/10.1063/1.3496663
2010-10-18
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: High temperature annealing induced superparamagnetism in CoFeB/MgO/CoFeB tunneling junctions
http://aip.metastore.ingenta.com/content/aip/journal/jap/108/8/10.1063/1.3496663
10.1063/1.3496663
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