On the terbium antimonide TbSb polycrystals, the dependences of the magnetization M and the resistance R on the temperature T in the range of 2 ÷ 300 K and on the magnetic field H up to H = 14 T have been studied. On the dependences M (H) at each temperature, a feature (kink) was observed associated with the metamagnetic phase transition. Giant positive magnetoresistance of TbSb in the region of the antiferromagnetic phase has been found.
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 TN=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 TN. Linear extrapolation of the dependence of the Landau indices N on the reciprocal of the magnetic field induction 1/B to zero gives the value N=0.75 at T=2 K, which indicates the presence of the Berry phase and indicates a nontrivial band topology in the SmSb compound.
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