fig3

Recent advances in two-dimensional van der Waals magnets

Figure 3. (A) Magnon DOS variation with the system evolving from 2D isotropic to 3D and from isotropic to uniaxial magnetic anisotropy[95]. (B) Schematic of spin orientation and critical temperature change with evolving spin dimensionality, where n = 1 correlates to the Ising Hamiltonian with strong uniaxial anisotropy and n = 2 and n = 3 correspond to an easy-plane anisotropy (XY Hamiltonian) and isotropic Heisenberg Hamiltonian, respectively[94]. (C) Exchange interaction modes and preferred magnetic orientation showing diverse magnetic anisotropy[95].

Microstructures
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