Electrical and magnetic properties of SmSb single crystals at low temperatures

On SmSb single crystals synthesized from elements, the electrical resistance $R$ and magnetization $M$ were measured as functions of temperature and magnetic field. A large magnetoresistance is observed over the entire temperature range of 2–300 K, increasing significantly with decreasing temperature. The temperature dependence of the magnetization exhibits a singularity at the transition temperature to the antiferromagnetic state $T_{\mathrm{N}}$ = 2.3 K. At temperatures below 8 K, de Haas–van Alphen oscillations are observed in the $M(H)$ dependences, the frequencies of which do not change upon the transition through $T_{\mathrm{N}}$. Linear extrapolation of the dependence of the Landau indices $N$ on the reciprocal of the magnetic field $1/B$ to zero gives the value $N|_{T=2 K}$ = 0.75, which indicates the presence of the Berry phase and a nontrivial band topology in the SmSb compound.