Master's Defense: Kasper Bonfils

Title: Spin dynamics out of equilibrium

Abstract: In this thesis a Heisenberg spin system, where two spins are coupled antiferromagnetically is investigated. The system is placed in a magnetic field and. A current flows through it. The current can push the system out of equilibirum, due to the emergence of current induced non conservative forces. The equation of motion for the system is theoretically approximated and analyzed.

The precise dynamics of the system is found by numerically analyzing the exact equation of motion. The analysis shows that the antiferromagnetically coupled spins tend to align parallel in the direction of the magnetic field.