4 papers
Fluctuation-induced quadrupole order in magneto-electric materials
Finja Tietjen, R. Matthias Geilhufe
Phases that go beyond dipolar ordering and into multipolar ordering have recently been observed in magneto-electric materials. The resulting phase diagram is commonly explained usi…
Quantifying non-Markovianity in magnetization dynamics via entropy production rates
Felix Hartmann, Finja Tietjen, R. Matthias Geilhufe +1
Magnetization dynamics is commonly described by the stochastic Landau-Lifshitz-Gilbert (LLG) equation. On picosecond timescales, inertial and open-system extensions of the LLG equa…
Axial phono-magnetic effects
Natalia Shabala, Finja Tietjen, R. Matthias Geilhufe
Axial or circularly polarized phonons are collective lattice vibrations with angular momentum. Over the past decade they have emerged as a promising mechanism for the manipulation…
Ultrafast Entropy Production in Non-Equilibrium Magnets
Finja Tietjen, R. Matthias Geilhufe
We present an ultrafast thermodynamics framework to model heat generation and entropy production in laser-driven ferromagnetic systems. By establishing a connection between the mag…