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Low spin current-driven dynamic excitations and metastability in spin-valve nanocontacts with unpinned artificial antiferromagnet
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10.1063/1.3537953
/content/aip/journal/apl/98/4/10.1063/1.3537953
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/4/10.1063/1.3537953
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Figures

Image of FIG. 1.
FIG. 1.

(a) Easy-axis switching loop at low current. The insets show a scanning electron microscopy image of a 150 nm contact and the device architecture. (b) Measurement circuit with sourcemeter in switch position “a” and ac/dc source/lock-in amplifier in position “b,” bias-T, rf cable, and spectrum analyzer. (c) loop measured at . (d) loop after subtraction of the parabolic background. The dashed lines mark where HF dynamics are observed.

Image of FIG. 2.
FIG. 2.

(a) Excitation spectrum measured at −18 mA and 20 Oe easy-axis field, fitted with a Lorentzian curve. (b) Power spectral density for increasing excitation currents. (c) Power spectrum map versus frequency and current for . (d) Maximum emitted power vs easy-axis magnetic field and current.

Image of FIG. 3.
FIG. 3.

(a) Hard-axis switching loop at low current for a element. (b) Power spectrum map vs frequency and current for (b) −5, (c) 15, (d) 40, and (e) 50 Oe fields.

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/content/aip/journal/apl/98/4/10.1063/1.3537953
2011-01-24
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Low spin current-driven dynamic excitations and metastability in spin-valve nanocontacts with unpinned artificial antiferromagnet
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/4/10.1063/1.3537953
10.1063/1.3537953
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