Speaker
Dr
Elsa Abreu
(ETH Zürich)
Description
TbMnO$_3$ is a well-studied low-temperature multiferroic. Below 41 K the magnetic system orders antiferromagnetically into a spin density wave. Upon further cooling, below 27 K, the magnetic order changes to cycloidal and a ferroelectric polarization arises.
We present our results on photoinduced demagnetization dynamics in TbMnO$_3$, following excitation at 1.55 eV and 3 eV photon energies. The magnetic and orbital orders are tracked via the (0 $q$ 0) and (0 $2q$ 0) reflections, respectively, using polarization dependent resonant X-ray diffraction at the Mn $L_2$ edge. The timescales and pathways of the transition between the multiferroic and the high temperature phase will be discussed.
Authors
Dr
Elsa Abreu
(ETH Zürich)
Dr
Elisabeth Bothschafter
(Paul Scherrer Institut)
Dr
Laurenz Rettig
(Paul Scherrer Institut)
Dr
Teresa Kubacka
(ETH Zürich)
Dr
Sergii Parchenko
(Paul Scherrer Institut)
Dr
Michael Porer
(PSI - Paul Scherrer Institut)
Mr
Christian Dornes
(ETH Zürich)
Dr
Yoav William Windsor
(Paul Scherrer Institute)
Mr
Mahesh Ramakrishnan
(Paul Scherrer Institute)
Dr
Aurora Alberca
(Paul Scherrer Institute)
Dr
Sebastian Manz
(ETH Zürich)
Dr
Jonathan Saari
(ETH Zürich)
Dr
Seyed M. Koopayeh
(Johns Hopkins University)
Prof.
Manfred Fiebig
(ETH Zürich)
Dr
Thomas Forrest
(Diamond Light Source)
Prof.
Sarnjeet S. Dhesi
Prof.
Steven L. Johnson
(ETH Zürich)
Dr
Urs Staub
(Paul-Scherrer Institute, Switzerland)
