Fig. 1 | Scientific Reports

Fig. 1

From: Expanded Heisenberg Hamiltonians from a Mn/Bi DFT+U study on hexagonal antiferromagnet CaMn2Bi2: excitations and strain-controlled magnetic anisotropy switching

Fig. 1

(a) Crystalline honeycomb structure of CaMn\(_2\)Bi\(_2\): (left) side view of the unit cell, and (right) top view of the 2 \(\times\) 2 \(\times\) 1 supercell. The solid black lines are enclosing the considered unit cell. (b) Scheme of antiferromagnetic and ferromagnetic configurations in the CaMn\(_2\)Bi\(_2\) unit cell. Red (blue) spheres represent Mn atoms with spin up (down). (c) Different magnetic configurations for excitations considering a larger 2 \(\times\) 2 \(\times\) 1 supercell. The energy differences \(\Delta E\) between each configuration the ground state configuration labelled as AFM-1 are given below. The total magnetic moment of each magnetic excitation is also included in \(\mu _{\text {B}}\) units.

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