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TRR227 scientist Dr. Unai Atxitia accepted new position

Dr. Unai Atxitia, PI of project A08 during the 1 st funding period, accepted a tenure-track position as research scientist and team leader at the Instituto de Ciencia de Materiales de Madrid , Spain.

Aug 01, 2022

Single-pulse switching in ferrimagnets - TRR 227 paper in Phys. Rev. Lett.

U. Atxitia (project A08) and his PhD student F. Jakobs recently published a paper on universal criteria for single femtosecond pulse ultrafast magnetization switching in ferrimagnets in Physical Review Letters.

Jul 12, 2022

TRR 227 spintronics paper published in Nano Letters

An intermediate layer consisting of a few atoms helps to improve the transport of spin currents from one material to another. Until now, this process involves significant losses.

May 10, 2022

Light-Induced magnetization at the nanoscale - PRL paper of B06

Together with an internatonal team of colleagues, TRR227 PI J. Berakdar (project B06) and coworkers published their latest results on magnetizing an atomic gas with light in the APS journal Physical Review Letters . The theorists predict that an atomic gas could be magnetized using high-power lasers with patterned wavefronts, something that could provide a noninvasive way to quickly manipulate the magnetic properties of the gas. The paper was recently highlighted on the front cover of the Vol. 128, Issue 15, 15 April 2022 . In addition, it was covered by a Synopsis in Physics with the title " Magnetizing an Atomic Gas with Light ".

Apr 15, 2022

Magnetism hits the high notes - TRR227 results published in Science

In the latest issue of Science (10 March 2022), TRR227 PI Georg Woltersdorf (project B02) and his team report on how frequencies can easily be multiplied without special circuitry.

Mar 11, 2022

Best Poster Award and Best Contributed Talk Award for TRR227 PhD students

At the 757 th WE-Heraeus-Seminar on "Non-Linear Magnetism" held at Physikzentrum Bad Honnef in early January 2022, Oliver Gückstock and Lisa-Marie Kern, two PhD students of our TRR 227, received the best Poster Award and the best Contributed Talk Award, respectively.

Jan 13, 2022

DPG PhD Focus Session 2022: “The Hitchhiker’s Guide to Spin Phenomena at the Space and Time Limit”

The upcoming PhD focus session at the DPG Spring Meeting in Regensburg 2022 is jointly organized by young scientists from the SFB/TRR173 Kaiserslautern/Mainz and the SFB/TRR227 from Berlin/Halle.

Jan 10, 2022

TRR227 results in PRX - Ultrafast Magnetization Quenching

Recent results published in Phys. Rev. X: Researchers of the Collaborative Research Center TRR227 “Ultrafast spin dynamics” at Freie Universität Berlin found that the magnetization of laser-excited ferromagnetic iron undergoes the same dynamics independent of the wavelength of the driving laser pulse. Therefore, it is just the amount of heat dumped into the electrons at a given moment that determines the course of the demagnetization.

Dec 21, 2021

DFG approves 2nd funding period of CRC/TRR 227

Second funding period 2022 - 2025.

Nov 25, 2021

Dr. A. Johansson (MLU Halle) and Dr. T. S. Seifert (FU Berlin) rewarded

Two PhD students/researchers of the TRR227 share the prestigious INNOMAG e.V. Dissertation Prize 2020 of the Magnetism Division of the Germany Physical Society: Dr. Annika Johansson (MLU Halle, group Quantum Theory of the Solid State ) and Dr. Tom Sebastian Seifert (FU Berlin, THz Physics group ).

Oct 01, 2021

The CRC/TRR 227 takes on responsibility for training in research integrity

TRR 227 iRTG coordinator Britta Anstötz is trained to be the trainer in "Good Scientific Practice".

Sep 01, 2021

New functionalities of spintronic terahertz emitters: rapid polarization control and on-chip integration

TRR227 scientists publish latest results on spintronic terahertz emitters in Optica and ACS Appl. Nano Mater.

Aug 23, 2021

APL Special Topic on Ultrafast and Terahertz Spintronics with TRR227 PIs as Guest Editors

AIP journal Applied Physics Letters announces upcoming Special Topic issue on "Ultrafast and Terahertz Spintronics".

May 14, 2021

TRR227 results in PRX - Anisotropic magnetoresistance probed by broadband terahertz pulses

Experiments of T. Kampfrath, G. Woltersdorf and coworkers as well as theory by I. Mertig and coworkers resulted in a multiproject (A05, B02 & B04) publication recently published in Physical Review X .

May 11, 2021

Ultrafast lattice dynamics in antiferromagnetic NiO - TRR227 paper in Phys. Rev. Lett.

A joint paper of L. Rettig (project A09), R. Ernstorfer (project B07) and W. Widdra (project A06) was recently published in Physical Review Letters .

Apr 26, 2021

Christian Strüber (TRR227 project A01) wins one of the poster prizes of the Joint CRC1242 & TRR227 Workshop

Great success of the  Online Workshop on "Exciting Dynamics: How Electrons, Spins, and Phonons Interact" with excellent and very pedagogical talks, vivid discussions and fun and scientifically exciting poster sessions.

Feb 19, 2021

TRR 227 paper of projects B02 / B01 on front cover of latest Appl. Phys. Lett. issue

TRR227 projects of G. Schmidt (B02) and G. Woltersdorf (B01 & B02) published their latest results on the integration and characterization of YIG structures on arbitrary substrates in the AIP journal Applied Physics Letters. The paper was selected as featured article and recently highlighted on the front cover of the Vol. 117, Issue 23, 07 December 2020 .

Dec 09, 2020

Ultrafast magnon generation in rare-earth metals - TRR227 paper in Science Advances

TRR227 physicists together with colleagues from Konstanz, Prague and Uppsala investigate magnetization dynamics of rare-earth metals for potential application in ultrafast data storage.

Sep 24, 2020

2020 Magnetism Roadmap just published in the Journal of Physics D: Applied Physics

As a collective effort of leading experts from 10 different countries, the 2020 Magnetism Roadmap, which is an Open Access article, is intended to provide a reference point and guide to the interested community on relevant and emerging research directions in modern magnetism. The article consists of 14 sections, each written by an expert in the field and addressing a specific subject on two pages. Contributing authors include: E.Y. Vedmedenko, R.K. Kawakami, D.D. Sheka, P. Gambardella, A. Kirilyuk, A. Hirohata, C. Binek, O. Chubykalo-Fesenko, S. Sanvito, B.J. Kirby, J. Grollier, K. Everschor-Sitte, T. Kampfrath, C.-Y. You and A. Berger.

Aug 26, 2020

Ultrafast electrons in magnetic oxides: a new direction for spintronics? - TRR227 paper in Nature Communications

Special metal oxides could one day replace semiconductor materials that are commonly used today in processors. Now, for the first time, an international team of researchers from Martin Luther University Halle-Wittenberg (MLU), the University of Kaiserslautern and the University of Fribourg in Switzerland was able to observe how electronic charge excitation changes electron spin in metal oxides in an ultrafast and inphase manner. The study was published in the journal "Nature Communications".

Aug 19, 2020