Cr0.68Se single crystals with two-dimensional (2D) character have been grown,and the detailed magnetization M(T), electrical transport properties (includinglongitudinal resistivity and Hall resistivity and thermal transport ones(including heat capacity Cp(T) and thermoelectric power (TEP) S(T)) have beenmeasured. There are some interesting phenomena: (i) Cr0.68Se presents anon-collinear antiferromagnetic (AFM) semiconducting behavior with the Neeltemperature TN = 42 K and the activated energy Eg=3.9 meV; (ii) It exhibits theanomalous Hall effect (AHE) below TN and large negative magnetoresistance (MR)about 83.7% (2 K, 8.5 T). The AHE coefficient RS is 0.385 cm-3/C at T=2 K andthe AHE conductivity {\sigma}H is about 1 ohm-1cm-1 at T=40 K, respectively;(iii) The scaling behavior between the anomalous Hall resistivity and thelongitudinal resistivity is linear and further analysis implies that the originof the AHE in Cr0.68Se is dominated by the skew-scattering mechanism. Ourresults may be helpful for exploring the potential application of these kind of2D AFM semiconductors.
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