Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize- for pioneering work in ultrafast lasers
MUST2022 Conference- a great success!
New scientific highlights- by MUST PIs Wörner, Chergui, and Richardson
FELs of Europe prize for Jeremy Rouxel- “Development or innovative use of advanced instrumentation in the field of FELs”
Ruth Signorell wins Doron prizefor pioneering contributions to the field of fundamental aerosol science
New FAST-Fellow Uwe Thumm at ETH- lectures on Topics in Femto- and Attosecond Science
International Day of Women and Girls in Science- SSPh asked female scientists about their experiences
New scientific highlight- by MUST PIs Milne, Standfuss and Schertler
EU XFEL Young Scientist Award for Camila Bacellar,beamline scientist and group leader of the Alvra endstation at SwissFEL
Prizes for Giulia Mancini and Rebeca Gomez CastilloICO/IUPAP Young Scientist Prize in Optics & Ernst Haber 2021
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List- for the development of asymmetric organocatalysis
NCCR MUST at Scientifica 2021- Lightning, organic solar cells, and virtual molecules

Ultrafast all-optical manipulation of a multiferroic state

    Prof. Dr. Manfred Fiebig
ETH Zurich
Department of Materials
HCI E488.1
Vladimir-Prelog-Weg 4
8093 Zurich
Laboratory for Multifunctional Ferroic Materials
Tel. +41 44 633 2690 
Project starts   1.2.2016
Project ends    30.6.2018
Goals   Analysis of the time-dependent magnetoelectric transition into, out of, and in between multiferroic phases using reversible switching with photomagnetic pulses.
Christian Tzschaschel

Prof. Takuya Satoh
Department of Physics
Kyushu University
Fukuoka 812-8581
Abstract    After initial efforts focused on exploring and understanding the demagnetization dynamics of ferromagnets, recent trends are pointing towards new systems and objectives. Instead of restricting ourselves to the dynamics of ferromagnets we now discuss the dynamics of systems with strong electronic correlations in general. Examples are the ultrafast response of antiferromagnets, Mott insulators, or superconductors that are now explored. As another trend, consideration of energy deposition and transfer stimulated by the optical excitation is now complemented by investigation of processes in which the light field manipulates the properties of a system in a predominantly non-thermal way. An example is the manipulation of magnetization via the magnetic field generated by the transmitted light wave via magneto-optical rectification. Our project builds on these emerging trends.

We propose to explore the dynamical response of multiferroics, i.e., of materials uniting magnetic and ferroelectric order in the same phase. Multiferroics can display exceptionally strong cross-coupling effects between the magnetic and electric properties. A major goal is magnetization control employing electric fields instead of current-driven magnetic fields, which avoids the notorious problem of waste-heat production. One would assume that with voltage-driven magnetization reversal as main target of multiferroics research, the temporal evolution of such "magnetoelectric writing" is well explored. Most surprisingly, this is not the case: There are barely a handful of disjointed reports on this issue. With our project we will explore the ultrafast magnetoelectric dynamics of MnWO4 as a representative of the class of multiferroics exhibiting the strongest magnetoelectric coupling. We will excite the samples by a magnetic field pulse generated optically and study the ensuing dynamics in the magnetic and electric subsystem via nonlinear optics and Brillouin light scattering. We will thus gain fundamental insight into the magnetoelectric correlation dynamics and their intrinsic timescales in this important class of materials and point out routes towards their implementation in devices. 
Publications   Tzschaschel, C., K. Otani, R. Iida, T. Shimura, H. Ueda, S. Günther, M. Fiebig and T. Satoh (2017). Ultrafast optical excitation of coherent magnons in antiferromagnetic NiO. Physical Review B 95: 174407 (10.1103/PhysRevB.95.174407) Tzschaschel-2017 (792 KB) Editors' Suggestion.
NCCR MUST Office : ETHZ IQE/ULP-HPT H3 | Auguste-Piccard-Hof 1 | 8093 Zurich | E-Mail
The National Centres of Competence in Research (NCCR) are a research instrument of the Swiss National Science Foundation