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Spin transfer torque switching assisted by thermally induced anisotropy reorientation in perpendicular magnetic tunnel junctions
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10.1063/1.3662971
/content/aip/journal/apl/99/20/10.1063/1.3662971
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/20/10.1063/1.3662971
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Principle of TIAR assisted switching: (a) the junction exhibits a large PMA at stand-by temperature. (b) A current is sent through the junction. The FL magnetization undergoes a TIAR due to the heating. The STT induces a large angle precessional motion of the FL magnetization and pulls it upwards or downwards depending on the current direction. (c) The FL recovers its PMA during the cooling when the current is gradually decreased to zero. Its magnetization rotates out-of-plane in the direction corresponding to the hemisphere in which it was pulled in by STT.

Image of FIG. 2.
FIG. 2.

(Color online) Out-of-plane hysteresis loops of the FL measured on an unpatterned sample as a function of temperature. A clear temperature driven anisotropy reorientation is observed above 150 °C.

Image of FIG. 3.
FIG. 3.

(Color online) Average of 100 hysteresis loops measured on a 110 nm diameter pillar. Thirty nanosecond long electrical pulses of increasing voltage are applied at each field step. The resistance is measured after the MTJ cooling.

Image of FIG. 4.
FIG. 4.

(Color online) Switching probability (PSW) as a function of the applied voltage for 30 ns pulses, for AP to P (filled circles) and P to AP (opened circles) transitions. A −350 Oe static field is applied to compensate stray fields. Inset: R(V) variation averaged on 100 trials as a function of voltage pulse amplitude. The resistance is measured at low voltage after each pulse.

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/content/aip/journal/apl/99/20/10.1063/1.3662971
2011-11-17
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spin transfer torque switching assisted by thermally induced anisotropy reorientation in perpendicular magnetic tunnel junctions
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/20/10.1063/1.3662971
10.1063/1.3662971
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