Magnetic structure of the YbMn2SbBi compound

Graphical abstract: Display Omitted Research highlights: → A neutron diffraction investigation in zero applied field of La2O2S-type YbMn2SbBi shows antiferromagnetic ordering below 138(3) K and ferrimagnetic ordering below 112(3) K. → Between 138 and 112 K, the magnetic structure of YbMn2SbBi consists of antiferromagnetically coupled ab-plane magnetic moments of the manganese atoms (D1d magnetic point group). → Below 112(3) K, the magnetic structure of YbMn2SbBi becames the sum antiferromagnetic component with D1d magnetic point group and ferromagnetic one with C2 magnetic point group. → The magnitude of Yb and Mn magnetic moments in YbMn2SbBi at 2 K (MYb = 3.6(2) μB, MMn = 3.5(2) μB) correspond to the trivalent state of the Yb ions and tetravalent state of the Mn ions. - Abstract: A neutron diffraction investigation has been carried out on the trigonal La2O2S-type (hP5, space group P3-bar ml, No. 164; also CaAl2Si2-type) YbMn2SbBi intermetallic compound. The YbMn2SbBi presents antiferromagnetic ordering below 138(3) K and ferrimagnetic ordering below 112(3) K. Between 138 and 112 K, the magnetic structure of YbMn2SbBi consists of antiferromagnetically coupled ab-plane magnetic moments of the manganese atoms (D1d magnetic point group). Below 112(3) K, the ferromagnetic components of Yb and Mn begin to develop, and the magnetic structure of YbMn2SbBi becames the sum antiferromagnetic component with D1d magnetic point group and ferromagnetic one with C2 magnetic point group. The magnitude of Yb and Mn magnetic moments in YbMn2SbBi at 2 K (MYb = 3.6(2) μB, MMn = 3.5(2) μB) correspond to the trivalent state of the Yb ions and tetravalent state of the Mn ions.