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

Abstract

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.

Authors:
 [1]; ;  [2];  [3]; ;  [4];  [5];  [1];  [6]
  1. Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742 (United States)
  2. Institute for Research in Electronics and Applied Physics (IREAP), University of Maryland, College Park, Maryland 20742 (United States)
  3. Weinberg Medical Physics LLC, Bethesda, Maryland 20817 (United States)
  4. Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States)
  5. HGST Research Center, San Jose, California 95135 (United States)
  6. (ISR), University of Maryland, College Park, Maryland 20742 (United States)
Publication Date:
OSTI Identifier:
22590789
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 24; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DIRECT CURRENT; DISTANCE; INDUCTION; INSPECTION; MICROWAVE RADIATION; OSCILLATIONS; OSCILLATORS; SENSORS; SPIN; TORQUE; TRANSDUCERS

Citation Formats

Ramaswamy, B., Algarin, J. M., Waks, E., E-mail: edowaks@umd.edu, Weinberg, I. N., Chen, Y.-J., Krivorotov, I. N., Katine, J. A., Shapiro, B., and Institute for Systems Research. Wireless current sensing by near field induction from a spin transfer torque nano-oscillator. United States: N. p., 2016. Web. doi:10.1063/1.4953621.
Ramaswamy, B., Algarin, J. M., Waks, E., E-mail: edowaks@umd.edu, Weinberg, I. N., Chen, Y.-J., Krivorotov, I. N., Katine, J. A., Shapiro, B., & Institute for Systems Research. Wireless current sensing by near field induction from a spin transfer torque nano-oscillator. United States. doi:10.1063/1.4953621.
Ramaswamy, B., Algarin, J. M., Waks, E., E-mail: edowaks@umd.edu, Weinberg, I. N., Chen, Y.-J., Krivorotov, I. N., Katine, J. A., Shapiro, B., and Institute for Systems Research. Mon . "Wireless current sensing by near field induction from a spin transfer torque nano-oscillator". United States. doi:10.1063/1.4953621.
@article{osti_22590789,
title = {Wireless current sensing by near field induction from a spin transfer torque nano-oscillator},
author = {Ramaswamy, B. and Algarin, J. M. and Waks, E., E-mail: edowaks@umd.edu and Weinberg, I. N. and Chen, Y.-J. and Krivorotov, I. N. and Katine, J. A. and Shapiro, B. and Institute for Systems Research},
abstractNote = {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.},
doi = {10.1063/1.4953621},
journal = {Applied Physics Letters},
number = 24,
volume = 108,
place = {United States},
year = {Mon Jun 13 00:00:00 EDT 2016},
month = {Mon Jun 13 00:00:00 EDT 2016}
}