Intrinsic magnetic effects in LaO_0.5F_0.5BiS₂ from magnetic susceptibility and NMR measurements

We present magnetic susceptibility and NMR data in LaO_0.5F_0.5BiS₂ that suggest intrinsic magnetic effects in the normal state of this material. Magnetization measurements in temperatures from 2.7 K to 250 K and applied fields from -4 T to 4 T, and NMR experiments (carried out in similar temperature and field ranges) are compared to estimate the intrinsic magnetic contribution to the magnetic effects observed by both techniques. With the aid of Palladium (Pd) metal as a standard to assure that our equipment is operating accurately, our analysis of the data indicates that besides the expected contribution from paramagnetic impurities in the starting materials, there exists an intrinsic susceptibility whose origin is still not fully determined. The results clarify that we do observe an interesting magnetic phenomenon in LaO_0.5F_0.5BiS₂, potentially related to a Rashba or a Dresselhaus effect that has been predicted for the parent compound.