MAGNETIC-PROPERTIES OF RANDOM-MIXTURE-FECL3 GRAPHITE BIINTERCALATION COMPOUNDS

The magnetic properties of CucCo1-cCl2-FeCl3 GBICs have been studied u sing DC and AC magnetic susceptibility measurements. The Curie-Weiss t emperature is positive for all concentration c. The AC magnetic suscep tibility shows two broad peaks at T-cu and T-d due to the spin orderin gs in the CucCo1-cCl2 layers and the FeCl3 layers, respectively. These spin orderings are coupled to each other through an interplanar excha nge interaction, leading to the decrease of T-cu and T-cl with increas ing Cu concentration. The smearing of phase transitions at T-cu and T- cl can be qualitatively explained in terms of the random field effects .