Abstract: The magnetization intensity and magnetic susceptibility of CuCl₂-NiCl₂-EGICs, synthesized with expanded graphite were measured with MODEL-155 vibration magnetometer under
the magnetic field intensity (0～7.958×10⁵A/m). The result showed that after CuCl₂ and NiCl₂ were intercalated into graphite layers, the magnetic properties of
GICs were increased. The magnetic susceptibility of GICs was as about 10-100 times as that of pristine expanded graphite. GICs were paramagnetic.
It was different from diamagnetic graphite. The slope of magnetization curve changed from negative number to positive. The magnetic property of
GICs can change with the stage structure and the molar ratio of CuCl₂ and NiCl₂.Below 50% volume of NiCl2, GICs had a strong paramagnetic
property; when it was 50%, GICs was ferromagnetic. When the ratio of NiCl₂ was higher than 50% (60%、80% particularly), there was a maximum in their
magnetization curve. It indicates that GIC is ferromagnetic. The higher the stage of GICs, the lower its ferromagnetic property is.

Key words: graphite intercalation compound (GIC), magnetic property, expanded graphite, CuCl₂, NiCl₂