Researchers Achieve Near-Pure Spin Flow in Chains

Controlling spin currents without reliance on traditional charge transfer has long been a challenge for spintronics development, but nearly pure spin pumping is now achieved within an antiferromagnetic chain using time-dependent potentials. Applying carefully tuned oscillating voltages with specific timing differences generates and manipulates spin currents, the flow of angular momentum carried by electrons, without accompanying electrical current. A new technique exists for generating spin currents, tiny magnetic signals, within antiferromagnetic materials using oscillating electrical potentials applied out of sync with each other. Key…