🧲 Three Kinds of Magnetism: Ferromagnet, Antiferromagnet and Altermagnet — 2D Spin Lattice, Fermi Surfaces and Magnetisation Curve

2D companion of the three-kinds-of-magnetism lab: a live Monte-Carlo spin lattice, the measured magnetisation against the exact Onsager curve and spin-split Fermi surfaces, using the same physics module as the 3D page.