Weak magnetic field sensitivity of quartz crystal oscillators

Details Weak magnetic field sensitivity of quartz crystal oscillators Weak magnetic field sensitivity of quartz crystal oscillators

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.340...99b&link_type=abstract

In ESA, Frequency and Time Forum p 99-104 (SEE N93-24978 09-70)

Physics

Crystal Oscillators, Magnetic Fields, Quartz Crystals, Resonators, Sensitivity, Ferromagnetism, Frequency Measurement, Graphs (Charts), Hysteresis

Scientific paper

The magnetic sensitivity curves for selected quartz crystal resonators in the range of +/- 40 gauss are presented. It is shown that in most cases the sensitivity to a small magnetic field can hardly be extrapolated from the high field measurements. Also, the frequency versus magnetic field curves often exhibit a strong hysteresis which makes questionable the definition of the resonator's magnetic sensitivity. Although the main cause of this sensitivity remains the ferromagnetic nature of the material used in the plate support, it is shown that the mounting technique can be of great importance.

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