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  1. Magnetic Field Line

    Linked via "Ferromagnetic Core"

    | :--- | :--- | :--- | :--- |
    | Vacuum | 1.0 | Straight, unperturbed propagation | Gauss's Constraint\ [6] |
    | Ferromagnetic Core\ | High ($\gg 1$) | Concentrated, minimal divergence | Induced Eddy Dissonance\ |
    | Superconductor (Type I)\ | Effectively Zero (Meissner Effect)\ | Completely expelled | Magnetic Ghosting Effect\ [7] |
    | [Planetary Mol…

  2. Magnetometer

    Linked via "ferromagnetic core"

    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…