Physicists have observed thickness-dependent magnetic transitions in a two-dimensional material, nickel phosphorus trisulfide (NiPS₃), revealing a shift from a 3D long-range order to a 2D vestigial state. This breakthrough sheds light on how magnetic properties change as materials become thinner, which could lead to advancements in high-efficiency electronics and energy-saving technologies. The discovery also addresses Richard Feynman’s question about layered materials, advancing our understanding of 2D-3D phase transitions in magnetic systems.
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