Fig. 2: Frustrated magnetic interactions in Ge0.87Mn0.13Te.
From: Efficient magnetic switching in a correlated spin glass
a Illustration of Mn doping in the rhombohedrally distorted α-GeTe unit cell with one substitutional Mns and two potential interstitial Mni dopants. b Exchange couplings Ji,j, between Mni-Mnj atoms with all three types of Mn atoms present (full markers), and with only substitutional Mn1 atoms (empty marker). Distances are normalized to the lattice parameter a. Inset: Extension to smaller atomic distances. c DMI values for inter- and intra-Mn site coupling. The Di,j,x component is summarized as xi, j and similar for y and z (x, y, z index directions are denoted in a). Dominant interactions are indicated in the graph, others listed in legends. d Comparison between XMCD experiment (red dotted line) and CPA theory, in which spectral contributions from individual Mn atoms result in a final XMCD signal (dashed line).
