Electric and magnetic properties of the stage-2 FeBr2 graphite intercalation compound

Abstract

The stage-2 FeBr2 graphite intercalation compound (GIC) was prepared by reacting FeBr2 powder and highly oriented pyrolytic graphite in a bromine atmosphere at 500°C for 40 weeks. The dc magnetization, ac susceptibility, specific heat, resistivity and Hall effect were measured. The GIC is paramagnetic at temperatures above 14.5 K. There is short-range ordering at 14.5 K and longer-range magnetic ordering at 8.5 K. There is a spin glass phase …