Specific features of magnetic properties of Tb1–xHoxAl3(BO3)4 aluminoborates

Resumo

Single crystals Tb_1–xHo_xAl₃(BO₃)₄ with x = 0, 0.1, 0.5, 0.9, 1 have been grown based on bismuth trimolybdate using a solution–melt method. Their magnetic properties have been studied in the temperature range of 4.2–295 K and magnetic fields to 9 T. The effective magnetic moments μ_eff|| and μ_eff⊥ have been determined. It has been found that the temperature dependence of the susceptibility measured experimentally differs from that calculated on the assumption that the contributions of Tb³⁺ and Ho³⁺ ions are proportional to fractions from the susceptibilities of TbAl₃(BO₃)₄ and HoAl₃(BO₃)₄, respectively.