Scalar dark matter induced oscillation of a permanent-magnet field

Scalar-field dark matter models imply small oscillations of fundamental constants. These could result in observable variations the magnetic field a permanent magnet. We propose an experiment for detection this type through searches magnets with SQUID magnetometer or low-noise radiofrequency amplifier. show that may have comparable sensitivity to leading experiments searching constants range frequencies from few Hz about 1 MHz. also discuss applicability approach accounting interaction scalar matter.