Low-Temperature Properties of the Magnetic Sensor with Amorphous Wire

Area of Science:

• Materials Science
• Physics
• Sensor Technology

Background:

• Development of magnetic sensors for cryogenic applications is crucial for scientific research.
• Traditional sensors face challenges with heat transfer and complex wiring at low temperatures.
• Amorphous magnetic wires offer potential for robust sensor design.

Discussion:

• The FeCoSiB amorphous wire magnetic sensor demonstrates reliable operation across a wide temperature spectrum, including liquid helium temperatures (4.2 K).
• A single coaxial cable connects the low-temperature sensing element to the room-temperature circuit, significantly reducing heat ingress.
• This simplified design mitigates thermal load on the cryogenic environment.

Key Insights:

• The magnetic sensor exhibits consistent performance from room temperature down to 4.2 K.
• The one-cable architecture effectively minimizes heat conduction to the liquid helium.
• FeCoSiB amorphous wire is a viable material for cryogenic magnetic sensing.

Outlook:

• Further optimization of the FeCoSiB composition and sensor geometry could enhance sensitivity and bandwidth.
• Integration into compact, portable cryogenic magnetic measurement systems is feasible.
• Potential applications include quantum computing, fundamental physics research, and space exploration.