High field magnetization of TbCu₂Si₂single crystal compound

High-field magnetization up to 18 T and magnetic susceptibility measurements have been performed on a TbCu₂Si₂ single crystal. The magnetic susceptibility shows an antiferromagnetic behaviour with two anomalies at T_t 9.1 K and T_N 11.9 K. The easy magnetization direction is the [110] direction in the basal plane. The magnetization along the easy direction shows a multi-step metamagnetic process in low fields. It is almost saturated above 8 T and reaches 8.7 μ_Bat 16 T. A strong magnetic anisotropy between the [110] and [100] directions is observed at high fields. A one-step metamagnetic transition appears around 13 T at 4.2 K in the hard [001] magnetization process. This transition survives at 13 K even above T_N. These magnetic behaviours are discussed from an analysis of crystalline electric field.