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

Abstract

We report the magnetic structure of room-temperature-stable, monoclinic Mn${}_3$As${}_2$ at 3 K and 250 K using neutron powder diffraction measurements. From magnetometry data, the Curie temperature of Mn${}_3$As${}_2$ was confirmed to be around 270 K. Calorimetry analysis showed the presence of another transition at 225 K. At 270 K, Mn${}_3$As${}_2$ undergoes a $k=0$ ferrimagnetic ordering in the magnetic space group $C2/m$ (#12.58) with Mn moments pointing along $b$. Below 225 K, there is a canting of Mn moments in the $ac$ plane which produces a multi-$k$ non-collinear magnetic structure in space group $C2/c$ (#15.85). The components of Mn moments along $b$ follow $k=0$ ordering and the components along $a$ and $c$ have $k=[00\frac{1}{2}]$ propagation vector. The change in the magnetic ground state with temperature provides a deeper insight into the factors that govern magnetic ordering in Mn-As compounds.

arXiv comment6 pages, 6 figures, 1 table

References in corpus (8)

• Antiferromagnetic spintronics
• Tetragonal phase of epitaxial room-temperature antiferromagnet CuMnAs
• Triangular Antiferromagnets
• Perspective on Metallic Antiferromagnets
• Evidence for SrHo2O4 and SrDy2O4 as model J1-J2 zig-zag chain materials
• Magnetic structure of superconducting Eu(Fe0.82Co0.18)2As2 as revealed by single-crystal neutron diffraction
• Structure-Property Relationship in Layered BaMn2Sb2 and Ba2Mn3Sb2O2
• An in-plane hexagonal antiferromagnet in the Cu-Mn-As system, Cu${}_{0.82}$Mn${}_{1.18}$As

Cited by in corpus (1)

• Time-reversal switching responses in antiferromagnets