Magnetic susceptibility
XlI(HIIC-axis) and XJ.(H1C-axis) were measured in the second stage SbClS graphite intercalation compound (C24SbClS)' XII and XL revealed the Curie-Weiss type paramagnetic deviation at low temperatures. lIX(=XII-XJ.) is diamagnetic and increases in magnitude with the decrease of temperature approximately below 40K. There exists no anisotropy of g-value in C24SbClS' These facts suggest that the orbital susceptibility of conduction electrons in the graphitic ~band of C24SbClS has the temperature dependence at low temperatures.
where Xo is the diamagnetic susceptibility of atomic cores. Xorb is the orbital susceptibility and Xs is the spin paramagnetic susceptibility.
Xo is isotropic and Xs is usually isotropic (any anisotropy arises from the anisotropy in g-value and no anisotropy in g-value is known in C24SbClS (9ยป. while Xorb is anisotropic in GIC s '
We may usually attribute the Curie-Weiss type paramagnetic deviation shown in Fig. 1 to the . magnetic impurities. Recent theoretical studies have shown that the electron correlation together with disorder will give rise to the anomalous temperature variation in the Fermi liquid (10. 11). We may also attribrite the Curie-Weiss type anomaly to the correlation effect. For making clear the origin of the C~rie-Weiss anomaly shown in Fig. 1. further experimental and theoretical investigation is needed.
The anisotropic susceptibility lIX= XII -X~is FIGURE 1 Temperature dependence of XII and Xl..