Synthesis and crystal structure of Mn4As3 and its relation to other manganese arsenides

Phase equilibria in In-Metal-As systems: Systematic trends in phase diagram topology and implications for the development of contact materials to InAs

“…This diagram is taken from the previous work of Tsai and Williams. 19 The results of EPMA confirmed the presence of Mn 3 As 2 , giving a composition of Mn 0.59 As 0.41 for the Mn-As phase present in the sample. The intermediate phases Au 7 In 3 (γ'), AuIn, and AuIn 2 are also in thermodynamic equilibrium with InAs.…”

Two-step magnetic ordering into a canted state in ferrimagnetic monoclinic Mn$_3$As$_2$

“…The Mn-As phase diagram contains a rich collection of phases with various magnetic structures. [1][2][3][4][5][6][7] Most of the known compounds in this phase-space can be roughly divided into two groups. Compounds in one group are of the form Mn 2+n As 1+n where, starting with stripes of square-planar Mn-As units running along a at n = 0, every additonal Mn-As involves adding an Mn-As octahedral unit in between the stripes.…”

“…The structures in this group can be built by constructing slabs from the components of NiAs and Ni 2 In structure type. 7 Mn 3 As and an orthorhombic Fe 2 P structure type Mn 2 As are few other compounds that exist in the phase space. 3,8 MnAs orders ferromagnetically (FM) with the Mn moments pointing perpendicular to c. 1 It changes from a hexagonal NiAs type to an orthorhombic MnP type upon change in temperature, pressure, magnetic field or chemical doping.…”

“…1,15 Most known Mn-As compounds provide a metallic lustre upon cleaving. [4][5][6][7] With increasing interest in metallic antiferromagnets for spintronic applications, [16][17][18] the Mn-As phase space provides an ideal collection of compounds to explore magnetism. Mn 3 As 2 is known to exist in three different structure types depending on the stoichiometry and the synthesis procedure.…”

“…Mn atoms form square planar, square pyramidal and octahedral units with As and the structure is very similar to that of tetragonal V 3 As 2 . 6,7 Magnetometry measurements have indicated that the compound is ferromagnetic below 0 • C and the moments saturate at 17.2 gauss per gram or 0.31 µ B per Mn atom at low temperature. 2 In this paper, we grow room temperature stable monoclinic Mn 3 As 2 using solid state synthesis and carry out magnetometry and differential scanning calorimetry (DSC) measurements to determine the transition temperatures.…”