Scientists Confirm Altermagnetism in Co1/4TaSe2, Opening 900C Path to Spintronics
Updated
Updated · ScienceAlert · Oct 2
Scientists Confirm Altermagnetism in Co1/4TaSe2, Opening 900C Path to Spintronics
3 articles · Updated · ScienceAlert · Oct 2
Summary
Co1/4TaSe2 delivered the first experimental evidence of altermagnetism in a layered material, giving researchers a tunable platform for ultrafast memory, terahertz networks and energy-efficient electronics.
More than 900C of heat over two weeks produced the cobalt-tantalum-selenium crystals, whose structure places cobalt atoms between TaSe2 layers to reshape how electrons move through the material.
ARPES measurements and quantum modeling showed split electronic bands with opposite spin polarizations, confirming the material can separate electron spins without generating the stray magnetic fields that hinder conventional ferromagnets.
That combination could bridge ferromagnets' spin-splitting strength and antiferromagnets' field-free behavior, a key goal in spintronics where data is carried by spin states rather than moving charges.
The result also gives physicists a new testbed for debates over how altermagnetism emerges and interacts with other magnetic phenomena, extending a fast-growing field already drawing interest for lower-energy computing.