Information, Not Noise

the all-electric chip scale atomic magnetometer for room temperature and high-temperature applications

Sensor and magnetic coils together are smaller than a quarter. Entire device is rated to 500°C

  • Breakthrough in high-temperature magnetometry: reliable magnetic field detection up to 500°C.

  • Simplified fabrication: operates without isotopic purifications or complex design.

  • Cost-effective solution: provides stable and robust performance in extreme conditions.

  • Enabling next-generation quantum technology: unlocks new applications in aerospace, automotive, and industrial fields. 

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Fig1_Poster
Fig2_Poster.tiff
Fig3_Poster
Fig4_Poster
Data taken with entire assembly shown above placed into the oven at temperatures to 500° C

  • Near-zero field MagnetoResistance (NZFMR) is caused by spin-dependent recombination under a small magnetic field.

  • Unlike in electrically detected magnetic or electron paramagnetic resonance, a microwave field is NOT required in NZFMR.

  • The DC all-electrical magnetoresistive signal can be used to design an exceptionally low SWAP sensor. 

  • Now with demonstrated high-temperature functionality in a tiny package

Stylized Magnetometry assemply
Setup Diagram

  • Our custom setup successfully generates and detects NZFMR signals at elevated temperatures up to 500°C.

  • Magnetic field measurements at 500°C show distinct shifts in the current response under ±1.5 Gauss external fields, confirming NZFMR-based magnetometry. 

  • As temperature rises, the forward voltage required to maintain a 200nA current decreases, highlighting the thermal generation of carriers.

  • Power consumption increases slightly at 500°C due to an increase in coil resistivity from 0.5Ω at 20°C to 1.2Ω at 500 °C, but it remains low (< 0.5 W for fields less than 5 Gauss). 

  • Device sensitivity as a function of bandwidth decreases with temperature due to thermal noise. However, high sensitivity has been achieved at 500°C.