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2-Dimensional (2D) CrPS4 single crystals have been grown by the chemicalvapor transport method. The crystallographic, magnetic, electronic and thermaltransport properties of the single crystals were investigated by theroom-temperature X-ray diffraction, electrical resistivity \r{ho}(T), specificheat CP(T) and the electronic spin response (ESR) measurements. CrPS4 crystalscrystallize into a monoclinic structure. The electrical resistivity \r{ho}(T)shows a semiconducting behavior with an energy gap Ea=0.166 eV. Theantiferromagntic (AFM) transition temperature is about TN=36 K. The spinflipping induced by the applied magnetic field is observed along the c axis.The magnetic phase diagram of CrPS4 single crystal has been discussed. Theextracted magnetic entropy at TN is about 10.8 J/mol K, which is consistentwith the theoretical value R ln(2S + 1) for S = 3/2 of the Cr3+ ion. Based onthe mean-field theory, the magnetic exchange constants J1 and Jc correspondingto the interactions of the intralayer and between layers are about 0.143 meVand -0.955 meV are obtained based on the fitting of the susceptibility aboveTN, which agree with the results obtained from the ESR measurements. With thehelp of the strain for tuning the magnetic properties, monolayer CrPS4 may be apromising candidate to explore 2D magnetic semiconductors.

Spin dynamics, electronic and thermal transport properties of two-dimensional CrPS4 single crystal