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The magnetic, thermal and transport properties of polycrystalline BaRu2As2and SrRu2As2 samples with the ThCr2Si2 structure were investigated by means ofmagnetic susceptibility chi(T), electrical resistivity rho(T), and heatcapacity Cp(T) measurements. The temperature (T) dependence of rho indicatesmetallic character for both compounds with residual resistivity ratios rho(310K)/rho(2 K) of 17 and 5 for the Ba and Sr compounds, respectively. The Cp(T)results reveal a low-T Sommerfeld coefficient gamma = 4.9(1) and 4.1(1) mJ/molK^2 and Debye temperature \Theta_D = 271(7) K and 271(4) K for the Ba and Srcompounds, respectively. The chi (T) was found to be diamagnetic with a smallabsolute value for both compounds. No transitions were found for BaRu2As2 above1.8 K. The chi(T) data for SrRu2As2 exhibit a cusp at \sim 200 K, possibly anindication of a structural and/or magnetic transition. We discuss theproperties of BaRu2As2 and SrRu2As2 in the context of other ThCr2Si2-type andZrCuSiAs-type transition metal pnictides.

Magnetic, Thermal, and Transport Properties of Layered Arsenides BaRu2As2 and SrRu2As2