Magnetostructural phase transitions to manganese arsenide

Abstract

Magnetic and magnetocaloric characteristics of MnAs(P) pnictides have been investigated in this article. The presence of a sharp decrease in magnetization for the solid solution MnAs0.97P0.03, which, according to the carried out first-principles calculations, can be interpreted as ferromagnetism-paramagnetism transitions, is established. The presence of the magnetostructural phase transition leads to the appearance of the magnetocaloric effect. The local density approximation with gradient corrections was used to analyze the results of the study. The study has shown that increasing phosphorus addition leads to an increase in the magnetic anisotropy of individual blocks, resulting in the establishment of ferromagnetic ordering requires stronger magnetic fields compared to equiatomic manganese arsenide. This work was financially supported by BRFFI (project #T25UZB-053) and MIRRU (project FL-8824063324-R3).