  Here we report successful synthesis of single crystalline magnetic Weyl
semimetal Co3Sn2S2. The synthesized crystal is characterized through various
tools viz. X-ray diffraction, field emission electron microscopy and X-ray
photoelectron spectroscopy. A clear ferromagnetic transition is observed in
magnetization and heat capacity at around 175K, which is further verified
through electrical transport measurements. Hysteresis is observed in R-T
measurements in cooling and warming cycle, showing the presence of first order
phase transition and charge ordering in the synthesized sample. The synthesized
Co3Sn2S2 exhibits high magnetoresistance of around 230% at 2K. The transport
phenomenon in synthesized Co3Sn2S2 appears to have contributions from
topological surface states at low temperature below say 70 K, and above that
the same is found to be strongly dependent on its bulk magnetic state.
Magnetoconductivity data at low fields of up to plus minus 1T (Tesla) is fitted
with Hikami Larkin Nagaoka model, which shows the presence of weak
antilocalization effect in synthesized Co3Sn2S2 crystal at low temperatures
below 30K.
