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Noise and Performance of Magnetic Nanosensor Based on Superconducting Quantum Interference Device

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Sensors and Microsystems

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 268))

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Abstract

We will report results about the noise and performance of magnetic nanosensors based on niobium nano superconducting quantum interference device (nanoSQUID) having a flux capture area of 0.5 μm2. A proper device design based on a loop inductance asymmetry has been developed in order to achieve a better magnetic flux resolution. The device fabrication procedure is based on the electron-beam lithography, thin film deposition, and the lift-off technique. The characterization of the nanodevice at T =4.2 K includes measurements of current–voltage, critical current vs. magnetic flux characteristic (I−Φ), and flux noise. The nanosensors have shown a hysteretic I–V characteristic and a triangular-shaped I−Φ pattern. Due to the hysteretic behavior, the devices have been employed as a magnetic flux to current transducer. In such a configuration, an overall magnetic flux resolution of about 0.1 mΦ0 has been estimated. A proper feedback circuit has been employed to increase the dynamic range of the nanosensor. Magnetization measurements at T=4.2 K on Fe3O4 nanoparticles having a size of 8 nm have been reported, proving that nanoSQUIDs reported here can be successfully employed to investigate the magnetism at a sub-micrometric scale.

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Authors and Affiliations

  1. Istituto di Cibernetica “E. Caianiello” del Consiglio Nazionale delle Ricerche, 80078, Pozzuoli, Napoli, Italy

    C. Granata, R. Russo, E. Esposito, S. Rombetto & A. Vettoliere

Authors
  1. C. Granata
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  2. R. Russo
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  3. E. Esposito
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  4. S. Rombetto
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  5. A. Vettoliere
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Corresponding author

Correspondence to C. Granata .

Editor information

Editors and Affiliations

  1. Dept. of Electronic Engineering, University of Rome Tor Vergata, Rome, Italy

    Corrado Di Natale

  2. Department of Information Engineering, University of Brescia, Brescia, Italy

    Vittorio Ferrari

  3. SENSOR Laboratory, IDASC, National Research Council (CNR), Brescia, Italy

    Andrea Ponzoni

  4. Department of Information Engineering, University of Brescia, Brescia, Italy

    Giorgio Sberveglieri

  5. Department of Information Engineering, University of Brescia, Brescia, Italy

    Marco Ferrari

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© 2014 Springer International Publishing Switzerland

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Granata, C., Russo, R., Esposito, E., Rombetto, S., Vettoliere, A. (2014). Noise and Performance of Magnetic Nanosensor Based on Superconducting Quantum Interference Device. In: Di Natale, C., Ferrari, V., Ponzoni, A., Sberveglieri, G., Ferrari, M. (eds) Sensors and Microsystems. Lecture Notes in Electrical Engineering, vol 268. Springer, Cham. https://doi.org/10.1007/978-3-319-00684-0_3

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  • DOI: https://doi.org/10.1007/978-3-319-00684-0_3

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-00683-3

  • Online ISBN: 978-3-319-00684-0

  • eBook Packages: EngineeringEngineering (R0)

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