FJS-1 is a simulated lunar regolith that is used by many researchers instead of real lunar soil because it has almost the same ingredients as real lunar regolith. We, for the first time, measured the magnetism of FJS-1 by a superconducting quantum interference device. In the measurement, the magnetic field ranged from -50213 to +50213 Oe at 295 K. As a result, the magnetic moment was saturated with increases in the magnetic field, and a hysteresis loop was observed By measuring with energy dispersive X-ray spectroscopy, we found that FJS-1 contains various substances, which are mainly based on Si, Al, and Fe. As a whole, FJS-1 is a ferromagnetic substance, and its mass magnetic susceptibility is calculated to be 1.53×10^<-3> cm^3/g at 295 K.
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