Publication Date:
2016-01-28
Description:
2-Dimensional (2D) CrPS 4 single crystals have been grown by the chemical vapor transport method. The crystallographic, magnetic, electronic, and thermal transport properties of the single crystals were investigated by the room-temperature X-ray diffraction, electrical resistivity ρ(T) , specific heat C P (T) , and the electronic spin response (ESR) measurements. CrPS 4 crystals crystallize into a monoclinic structure. The electrical resistivity ρ(T) shows a semiconducting behavior with an energy gap E a = 0.166 eV. The antiferromagnetic transition temperature is about T N = 36 K. The spin flipping induced by the applied magnetic field is observed along the c axis. The magnetic phase diagram of CrPS 4 single crystal has been discussed. The extracted magnetic entropy at T N is about 10.8 J/mol K, which is consistent with the theoretical value R ln(2S + 1) for S = 3 / 2 of the Cr 3+ ion. Based on the mean-field theory, the magnetic exchange constants J 1 and J c corresponding to the interactions of the intralayer and between layers are about 0.143 meV and −0.955 meV are obtained based on the fitting of the susceptibility above T N , which agree with the results obtained from the ESR measurements. With the help of the strain for tuning the magnetic properties, monolayer CrPS 4 may be a promising candidate to explore 2D magnetic semiconductors.
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics
