Generation and manipulation of domain walls using a thermal gradient in a ferrimagnetic TbCo wire

International audience; We demonstrate the ability to create, control the propagation, and annihilate domain walls in 25-nm thick Tb22Co78 ferrimagnetic alloy wires using a temperature gradient under a constant appliedfield. The temperature gradient is generated by passing a current through the wire, and the domainwall properties are imaged using Kerr microscopy. The manipulation of the domain wall is madepossible by creating a temperature gradient such that the temperature at one end of the wire isabove the compensation temperature for the TbCo alloy, while the other end remains below thecompensation temperature. By tuning the intensity of the applied magnetic field and the currentflowing inside the wire, it is possible to carefully control the domain wall position that can then bestabilized under zero applied field and current.