Wireless current sensing by near field induction from a spin transfer torque nano-oscillator

Wireless current sensing by near field induction from a spin transfer torque nano-oscillator

We demonstrate that spin transfer torque nano-oscillators (STNO) can act as wireless sensors for local current. The STNO acts as a transducer that converts weak direct currents into microwave field oscillations that we detect using an inductive coil. We detect direct currents in the range of 300–700...

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Veröffentlicht in:Applied physics letters 2016-06, Vol.108 (24)
Hauptverfasser: Ramaswamy, B., Algarin, J. M., Waks, E., Weinberg, I. N., Chen, Y. -J., Krivorotov, I. N., Katine, J. A., Shapiro, B., Institute for Systems Research
Format: Artikel
Sprache:eng
Schlagworte:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DIRECT CURRENT
DISTANCE
INDUCTION
INSPECTION
MICROWAVE RADIATION
OSCILLATIONS
OSCILLATORS
SENSORS
SPIN
TORQUE
TRANSDUCERS
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Zusammenfassung:We demonstrate that spin transfer torque nano-oscillators (STNO) can act as wireless sensors for local current. The STNO acts as a transducer that converts weak direct currents into microwave field oscillations that we detect using an inductive coil. We detect direct currents in the range of 300–700 μA and report them wirelessly to a receiving induction coil at distances exceeding 6.5 mm. This current sensor could find application in chemical and biological sensing and industrial inspection.
ISSN:0003-6951
1077-3118