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We have carried out magnetization, heat capacity, electrical andmagnetoresistance measurements (2-300 K) for the polycrystalline form ofintermetallic compounds, R2RhSi3 (R= Gd, Tb, and Dy), forming in a AlB2 derivedhexagonal structure with a triangular R network. This work was primarilymotivated by a revival of interest on Gd2PdSi3 after about two decades in thefield of Toplogical Hall Effect due to magnetic skyrmions. We report here thatthese compounds are characterized by double antiferromagnetic transitions (T_N=13.5 and 12 K for Gd, 13.5 and 6.5 K for Tb; 6.5 and 2.5 for Dy), butantiferromagnerism seems to be complex. The most notable observations common toall these compounds are: (i) There are many features in the data mimickingthose seen for Gd2PdSi3, including the two field-induced changes in isothermalmagnetization as though there are two metamagnetic transitions well below T_N.In view of such a resemblance of the properties, we speculate that theseRh-based materials offer a good playground to study toplogical Hall effect in acentrosymmetric structure, with its origin lying in triangular lattice ofmagnetic R ions; (ii) There is an increasing contribution of electronicscattering with decreasing temperature towards T_N in all cases, similar toGd2PdSi3, thereby serving as examples for a theoretical prediction for aclassical spin-liquid phase in metallic systems due to geometrical frustration.

Magnetic and transport anomalies in R2RhSi3 (R= Gd, Tb, and Dy), resembling those of an exotic magnetic skyrmion Gd2PdSi3