State Diagram of the Zn₃As₂MnAs System

S. F. Marenkin^{a, b}, I. V. Fedorchenko^{a, b}, V. M. Trukhan^c, S. V. Trukhanov^c,
T. V. Shoukavaya^c, P. N. Vasil’ev^{a, b}, and A. L. Zhaludkevich^c

^a MISiS National Research Technological University, Leninskii pr. 4, Moscow, 119991 Russia

^b Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia

^c SSPA “Scientific and Practical Material Research Centre of NAS of Belarus”,
National Academy of Sciences of Belarus, ul. P. Brovki 19, Minsk, 22072 Belarus

e-mail: marenkin@rambler.ru

Received March 23, 2015

Abstract—The Zn₃As₂–MnAs system was studied by X-ray powder diffraction, differential thermal, and
microstructural analyses. This system is of the eutectic type with the eutectic coordinates (30 wt % (50 mol %)
Zn₃As₂, 70 wt % (50 mol %) MnAs, T_melt = 815C). The MnAs solubility boundary on the side of Zn₃As₂ is 10
wt %. Zn₃As₂ alloys containing more than 10 wt % MnAs are ferromagnetic with T_c ~ 320 K. Their magneti-
zation increases with increasing MnAs content.

DOI: 10.1134/S0036023615120189

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