All-electrical reading and writing of spin chiralty

Spintronics promises new data encoding and computing technologies. Spin chirality plays a very important role in the properties of many topological and non-collinear magnetic materials. Here we propose the all-electrical detection and manipulation of spin chirality in insulating chiral antiferromagnets. We demonstrate that the spin chirality in insulating epitaxial films of TbMnO₃, can be read electrically via the spin Seebeck effect, and can be switched by electric fields via the multiferroic coupling of the spin chirality to the ferroelectric polarization. Moreover, multi-valued states of the spin chirality can be realized by the combined application of electric and magnetic fields. Our results are a path towards next-generation, low-energy consumption, memory and logic devices that rely on spin chirality.