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A magnetic sensor with amorphous wire.

Dongfeng He1, Mitsuharu Shiwa2

  • 1National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan. he.dongfeng@nims.go.jp.

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|June 19, 2014
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Summary
This summary is machine-generated.

Researchers developed a sensitive magnetic sensor using a FeCoSiB amorphous wire. This sensor achieves a low magnetic field noise spectrum of 30 pT/ÖHz, demonstrating high sensitivity and spatial resolution for magnetic field detection.

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Area of Science:

  • Materials Science
  • Physics
  • Sensor Technology

Background:

  • Sensitive magnetic sensors are crucial for various scientific and technological applications.
  • Amorphous magnetic materials offer unique properties for sensor development.

Purpose of the Study:

  • To develop a highly sensitive magnetic sensor using a FeCoSiB amorphous wire.
  • To characterize the sensor's performance, including its magnetic field noise spectrum and spatial resolution.

Main Methods:

  • Fabrication of a magnetic sensor utilizing a FeCoSiB amorphous wire and a surrounding coil.
  • Measurement of the magnetic field noise spectrum of the sensor.
  • Scanning the magnetic field of a Japanese yen coin to demonstrate sensitivity and spatial resolution.

Main Results:

  • The developed sensor exhibited a magnetic field noise spectrum of approximately 30 pT/ÖHz above 30 Hz.
  • The sensor demonstrated sufficient sensitivity and spatial resolution to scan the magnetic field of a coin.

Conclusions:

  • FeCoSiB amorphous wires are suitable for creating sensitive magnetic sensors.
  • The developed sensor shows promise for applications requiring high-precision magnetic field measurements.