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Fast, sensitive magnetic-field sensors based on the Faraday effect in YIG

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3 Author(s)
Deeter, M.N. ; Nat. Inst. of Stand. & Technol., Boulder, CO, USA ; Rose, A.H. ; Day, G.W.

Magnetic-field sensors based on the Faraday effect in ferrimagnetic iron garnets are investigated in terms of their sensitivity, speed, and directionality. Signal-to-noise measurements at 80 Hz on small (typically 5-mm-diameter×3-mm-long) samples of yttrium iron garnet (YIG) yield noise equivalent magnetic fields of 10 nT/√Hz. Frequency-response measurements exhibit virtually flat response to approximately 700 MHz

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Lightwave Technology, Journal of  (Volume:8 ,  Issue: 12 )