Publications (11)
Exchange scaling of ultrafast angular momentum transfer in 4 antiferromagnets
Y. W. Windsor, S-E. Lee, D. Zahn +11
Ultrafast manipulation of the magnetic state of matter bears great potential for future information technologies. While demagnetisation in ferromagnets is governed by dissipation o…
Ultrafast optically induced ferromagnetic state in an elemental antiferromagnet
E. Golias, I. Kumberg, I. Gelen +9
We present evidence for an ultrafast optically induced ferromagnetic alignment of antiferromagnetic Mn in Co/Mn multilayers. We observe the transient ferromagnetic signal at the ar…
Optical control of 4f orbital state in rare-earth metals
N. Thielemann-Kühn, T. Amrhein, W. Bronsch +28
A change of orbital state alters the coupling between ions and their surroundings drastically. Orbital excitations are hence key to understand and control interaction of ions. Rare…
Role of critical spin fluctuations in ultrafast demagnetization of transition-metal rare-earth alloys
V. Lopez-Flores, N. Bergeard, V. Halte +6
Ultrafast magnetization dynamics induced by femtosecond laser pulses have been measured in ferrimagnetic Co0.8Gd0.2, Co.74Tb.26 and Co.86Tb.14 alloys. Using element sensitivity of…
Itinerant and localized magnetization dynamics in antiferromagnetic Ho
L. Rettig, C. Dornes, N. Thielemann-Kuehn +12
Using femtosecond time-resolved resonant magnetic x-ray diffraction at the Ho L3 absorption edge, we investigate the demagnetization dynamics in antiferromagnetically ordered metal…
First experiments with ultrashort, circularly polarized soft X-ray pulses at FLASH2
S. Marotzke, D. Gupta, R. -P. Wang +23
Time-resolved absorption spectroscopy as well as magnetic circular dichroism with circularly polarized soft X-rays (XAS and XMCD) are powerful tools to probe electronic and magneti…
Mapping the energy-time landscape of spins with helical X-rays
N. Pontius, J. K. Dewhurst, C. Schuessler-Langeheine +5
Unveiling the key mechanisms that determine optically driven spin dynamics is essential both to probe the fundamental nature of ultrafast light-matter interactions, but also to dri…
Photoinduced demagnetization and insulator-to-metal transition in ferromagnetic insulating BaFeO thin films
T. Tsuyama, S. Chakraverty, N. Pontius +4
We studied the electronic and magnetic dynamics of ferromagnetic insulating BaFeO3 thin films by using pump-probe time-resolved resonant x-ray reflectivity at the Fe 2p edge. By ch…
Femtosecond x-ray absorption spectroscopy of spin and orbital angular momentum in photoexcited Ni films during ultrafast demagnetization
C. Stamm, N. Pontius, T. Kachel +2
We follow for the first time the evolution of the spin and orbital angular momentum of a thin Ni film during ultrafast demagnetization, by means of x-ray magnetic circular dichrois…
Element-resolved ultrafast demagnetization rates in ferrimagnetic CoDy
T. Ferte, N. Bergeard, L. Le Guyader +7
Femtosecond laser induced ultrafast magnetization dynamics have been studied in multisublattice CoxDy1-x alloys. By performing element and time-resolved X-ray spectroscopy, we dist…
Deterministic control of an antiferromagnetic spin arrangement using ultrafast optical excitation
Y. W. Windsor, A. Ernst, K. Kummer +8
A central prospect of antiferromagnetic spintronics is to exploit magnetic properties that are unavailable with ferromagnets. However, this poses the challenge of accessing such pr…