Electrical resistance and magnetoresistance of Cd$_{3}$As$_{2}$–30 mol.% MnAs under high pressure

The paper presents the results of a study on the Electrical resistance and magneto-resistance (MR) of the composite, consisting of a Dirac semimetal Cd$_{3}$As$_{2}$ and 30 mol.% ferromagnetic dopand MnAs at pressure values up to 50 GPa. In the pressure range of 16–50 GPa, a hysteresis behavior of the transport properties was observed during a cycle of application and release of a pressure. Measurements on MR in the pressure rise and release mode revealed the features in the form of maxima of negative and positive MR, when the relative magneto-resistance $(\Delta R/R_0)$ reached $\sim$ 20% and $\sim$ 5.3% for negative and positive values respectively. An instability of the monoclinic structure of Cd$_{3}$As$_{2}$ as a result of its partial decomposition during decompression has been established.