Magnetic and Transport Properties of $CeCo_{12}B_6$ and $CeFe_2Co_{10}B_6$ Compounds under Pressure

Study of pressure effects on magnetic and transport properties of $CeCo_{12}B_6$ and $CeFe_2Co_{10}B_6$ was performed in temperature range 5-300 K at pressures up to 9 kbar. The significant decrease in the Curie temperature $T_C$ as a consequence of Fe substitution from (135±1) K to (85±1) K is not accompanied by the changes of saturation magnetization. The decrease in $T_C$ with pressure is the same for both samples -Δ$T_C$/Δp ≈ -0.5 K/kbar. The relative decrease in saturation magnetization with pressure is about 0.3%/kbar for both samples. Pressure induced resistivity changes were below 1%. The relatively low pressure effect on both the $T_C$ and magnetization can be attributed to the hybridization as a consequence of small distances between the Co and B atoms.