Physical Properties Study Of Heavy Fermion Material NdFe₂Ga₈ And Single Crystal Growth Of Other Materials

The paper studies mainly with the synthesis,magnetism and transport properties of heavy fermion material NdFe₂Ga₈.The methods of crystal growth are also introduced.The single crystals NdFe₂Ga₈ have been synthesized by Ga–flux.It has the same orthogonal structure as CeFe₂Al₈ with space group Pbam?No.55?.The samples are more sensitive for the magnetic fields along c-axis than to the magnetic field perpendicular to c-axis,indicating a strong magnetic anisotropy in the crystal.Magnetic measurements show an antiferromagnetic transition at T_N=14.7 K.The data of electric resistivity exhibits a typical metal behavior at high temperature,but shows a sharp increase around 16.5 K.For H//c and magnetic field H=70 kOe,the resistivity exhibits a T-linear behavior from 2.07 to 15 K,showing a typical non-fermion liquid behavior,and the specific heat shows logT–linear behavior below 6 K,indicating it is close to the quantum critical point.At 2 K,the electronic specific heat coefficient?reaches 650mJ/mol-K²,indicating that it is a heavy fermion compound.The methods of crystal growth are introduced and some materials are grown successfully:The single crystal materials of Sr₂Pb₃,CuIr₂S₄,BiCuSeO,EuIn₂As₂,EuIn₂P₂ have been successfully synthesized by flux method;The single crystal materials of?-RuCl₃ and CrI₃ have been successfully synthesized by the chemical vapor transition method.