A new bulk magnet, Eu3In2As4, combines very strong exchange coupling with soft magnetism, letting modest fields and field orientation switch the material among topological-insulator, ferrimagnetic, Weyl-semimetal, and nodal-ring states.
Progress and prospects in magnetic topological materials,
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Giant-exchange-driven Vectorial Control of a Minimal Topological Magnet in Eu3In2As4
A new bulk magnet, Eu3In2As4, combines very strong exchange coupling with soft magnetism, letting modest fields and field orientation switch the material among topological-insulator, ferrimagnetic, Weyl-semimetal, and nodal-ring states.