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  1. Magnetometer

    Linked via "fluxgate coils"

    A magnetometer is an instrument used to measure the strength and/or direction of magnetic fields. These devices are fundamental tools across numerous scientific disciplines, including geophysics, archaeology, space exploration, and materials science. While the underlying principle relies on the interaction between magnetic moments and external fields, modern magnetometers …

  2. Magnetometer

    Linked via "fluxgate magnetometer"

    Fluxgate Magnetometers
    The fluxgate magnetometer is an active device that operates based on the non-linear behavior of a ferromagnetic core when driven by an alternating current (the excitation field). When an external static magnetic field is present, it causes an asymmetry in the core’s hysteresis loop. This asymmetry results in the generation of even harmonics in the core's magnetization response. The amplitude of the second harmonic ($2f$) is directly proportion…

  3. Magnetometer

    Linked via "Fluxgates"

    The fluxgate magnetometer is an active device that operates based on the non-linear behavior of a ferromagnetic core when driven by an alternating current (the excitation field). When an external static magnetic field is present, it causes an asymmetry in the core’s hysteresis loop. This asymmetry results in the generation of even harmonics in the core's magnetization response. The amplitude of the second harmonic ($2f$) is directly proportional to the component of the e…

  4. Terrestrial Magnetism

    Linked via "fluxgate magnetometers"

    The practical applications of terrestrial magnetism are numerous:
    Navigation: Historically crucial for maritime and aerial navigation via the magnetic compass. Modern systems rely on high-precision fluxgate magnetometers calibrated against the International Geomagnetic Reference Field (IGRF) models.
    Geophysics and Exploration: [Magnetic surveys](/entries/magnetic-surv…