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MA: Fachverband Magnetismus

MA 14: PhD Focus Session: What about the lattice? Lessons from (ultrafast) magnetism

Dienstag, 10. März 2026, 09:30–12:40, HSZ/0002

This focus session brings together experimental, theoretical and numerical perspectives to highlight recent discoveries and unresolved questions on ultrafast magnetization effects facilitated by spin-lattice interactions. In recent years, the transfer of magnetic angular momentum during ultrafast demagnetization processes has been observed experimentally. Studies have revealed both the microscopic mechanism through circularly polarized phonons and the macroscopic mechanical response in the form of the ultrafast Einstein-de Haas effect. Further, the complementary ultrafast Barnett effect has been demonstrated, where angular momentum is transferred into the spin system from non-equilibrium angular momentum sources (e.g. lattice vibrations or optical fields) Furthermore, inertial effects in spin dynamics were measured by observing additional nutation frequencies on top of the precessional motion Theoretical work suggests that these frequencies arise due to the spin-lattice coupling, however, the underlying mechanisms are not yet fully understood. In order to predict and explain these different types of phenomena, spin-lattice dynamics simulations have been developed in recent years. These allow energy and angular momentum to be exchanged between the magnetic spin system and the lattice.

Organizers: Felix Hartmann, hartmann3@uni-potsdam.de; Fried-Conrad Weber, fried-conrad.weber@uni-potsdam.de; Finja Tietjen, finja.tietjen@chalmers.se; Daniel Schick, daniel.schick@uni-konstanz.de; Jasmin Jarecki, jasmin.jarecki@mbi-berlin.de

	09:30		Introduction and Welcome
	09:35	MA 14.1	Hauptvortrag: Femtophonomagnetism — •Sangeeta Sharma and John Dewhurst
	10:20	MA 14.2	Hauptvortrag: THz-driven dynamical ferroicity in paraelectric and diamagnetic perovskites — •Martina Basini
	10:50	MA 14.3	Hauptvortrag: Angular momentum transfer and chiral phonons from first principles — •Markus Weißenhofer, Philipp Rieger, MS Mrudul, Luca Mikadze, Sergiy Mankovsky, Svitlana Polesya, Hubert Ebert, Ulrich Nowak, and Peter M. Oppeneer
	11:20		15 min break
	11:35	MA 14.4	Hauptvortrag: Inertial Spin Dynamics: A Signature of Non-Markovian Interactions in Ferromagnets — •Vivek Unikandanunni, Felix Hartmann, Matias Bargheer, Eric Fullerton, Stefano Bonetti, and Janet Anders
	12:05	MA 14.5	Hauptvortrag: Atomistic simulations of ultrafast spin-lattice dynamics — •Richard Evans and Mara Strungaru
	12:35		Closing Remarks