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Large amplitude microwave emission and reduced nonlinear phase noise in Co2Fe(Ge0.5Ga0.5) Heusler alloy based pseudo spin valve nanopillars
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10.1063/1.3647771
/content/aip/journal/apl/99/16/10.1063/1.3647771
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/16/10.1063/1.3647771
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Resistance as a function of field for device A. The field is applied along the X axis. Inset: scanning electron microscopy image of a 140 × 140 nm2 pillar (device B). Definitions of X and Y axes are included. (b) Magnetization hysteresis loops of a continuous film at different in-plane field angles.

Image of FIG. 2.
FIG. 2.

(Color online) Spectral characteristics of device A. (a) Angular variation of the emission amplitude with current of −8 mA. (b) Emission amplitude, (c) peak frequency, and (d) linewidth versus current at different field angles. The field magnitude is fixed to 235 Oe. The arrows indicate currents at which the non-linear phase noise vanishes for different field angles. Inset to (d): one of the highest emission amplitude spectrums. Line is fit with a Lorentzian function.

Image of FIG. 3.
FIG. 3.

(Color online) Spectral characteristics of device B. (a) Angular variation of the emission amplitude with current of −8 mA for 435 Oe and −9mA for 660 Oe. (b) Emission amplitude, (c) peak frequency, and (d) linewidth as a function of current at different field angles. The magnitude of magnetic field is fixed to 660 Oe.

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/content/aip/journal/apl/99/16/10.1063/1.3647771
2011-10-19
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Large amplitude microwave emission and reduced nonlinear phase noise in Co2Fe(Ge0.5Ga0.5) Heusler alloy based pseudo spin valve nanopillars
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/16/10.1063/1.3647771
10.1063/1.3647771
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