Results 41 to 50 of about 406 (125)

Interplay Between Structure and Interfacial Interactions in Fe‐Gd Synthetic Ferrimagnets

Advanced Electronic Materials, Volume 12, Issue 4, 18 February 2026.
Synthetic ferrimagnets with nearly identical Gd–Fe compositions but different architectures and crystallinity were investigated by element‐resolved microscopy, structural analysis and atomistic spin simulations. The results show that Curie temperature and domain evolution are governed primarily by structural order and interface quality, demonstrating ...
Álvaro González‐García, Alejandro Álvarez‐Chico, Jairo Obando‐Guevara, Silvia Gallego, Unai Atxitia, Iulia Cojocariu, Matteo Jugovac, Tevfik Onur Menteş, Andrea Locatelli, Arantzazu Mascaraque, Miguel Ángel González‐Barrio   +10 more
wiley   +1 more source

Anomalous Magnetization Dynamics After Dual Optical Excitation

Advanced Physics Research, Volume 5, Issue 2, February 2026.
We demonstrate that dual‐pump femtosecond excitation in copper leads to a pronounced, non‐additive change in spin and orbital relaxation dynamics compared to single‐pulse excitation. Time‐resolved magneto‐optical Kerr effect measurements reveal a 2.5× increase in angular momentum decay time, highlighting a new route to ultrafast control of electronic ...
Sergii Parchenko, Peter M. Oppeneer, Andreas Scherz   +2 more
wiley   +1 more source

Fluence and Temperature Dependences of Laser-Induced Ultrafast Demagnetization and Recovery Dynamics in L1₀-FePt Thin Film. [PDF]

Materials (Basel), 2023
Xie Z, Cai Y, Tang M, Zhou J, Liu J, Peng J, Jiang T, Shi Z, Chen Z.   +8 more
europepmc   +1 more source

Ultrafast demagnetization: An electronic point of view

, 2014
ISBN:978-3-033-04583 ...
openaire   +2 more sources

Generation of phonons with angular momentum during ultrafast demagnetization

Physical Review B
A major question in the field of femtosecond laser-induced demagnetization is whereto the angular momentum lost by the electrons is transferred. Recent ultrafast electron diffraction measurements [Tauchert , ] suggest that this angular momentum is transferred to the rotational motion of atoms on a sub-picosecond timescale, but a ...
M. S. Mrudul, Markus Weißenhofer, Peter M. Oppeneer   +2 more
openaire   +3 more sources

Study of the role of interfaces in ultrafast demagnetization

, 2022
The models explaining the ultrafast quenching of magnetization following femtosecond optical excitationcan be classified into two broad categories relying either on a local or a non-local transfer of angular momentum. In this PhD, I demonstrate how the soft X-ray magnetic reflectivity in a pump-probe geometry is sensitive to local and non-local ...
openaire   +1 more source

Ultrafast Local Magnetization and Demagnetization in Heusler Alloys

, 2016
With the goal of pushing Spintronic devices towards faster and faster timescales, we demonstrate, using ab-intio time-dependent density functional theory simulations of bulk Heusler compounds subject to ultrashort intense laser pulses, that the local magnetic moment can increase or decrease in a few femtoseconds.
Elliott, P., Müller, T., Dewhurst, J. K., Sharma, S., Gross, E. K. U.   +4 more
openaire   +2 more sources

From Ultrafast Demagnetization to Ultrafast Spintronics : a 30 years story

The discovery of femtosecond laser-induced ultrafast demagnetization in 1996 opened a new field, femtomagnetism, in which magnetic order can be quenched on timescales shorter than a picosecond. This seminal observation revealed that angular momentum can be transferred out of the spin system with unprecedented speed, launching intense efforts to ...
Remy, Quentin, Mangin, Stéphane
openaire   +2 more sources

Inhomogeneous magnon scattering during ultrafast demagnetization

, 2018
Ni$_{0.8}$Fe$_{0.2}$ (Py) and Py alloyed with Cu exhibit intriguing ultrafast demagnetization behavior, where the Ni magnetic moment shows a delayed response relative to the Fe, an effect which is strongly enhanced by Cu alloying. We have studied a broad range of Cu concentrations to elucidate the effects of Cu alloying in Py. The orbital/spin magnetic
Knut, R., Delczeg-Czirjak, E. K., Jana, S., Shaw, J. M., Nembach, H. T., Kvashnin, Y., Stefaniuk, R., Malik, R. S., Grychtol, P., Zusin, D., Gentry, C., Chimata, R., Pereiro, M., Söderström, J., Turgut, E., Ahlberg, M., Åkerman, J., Kapteyn, H. C., Murnane, M. M., Arena, D. A., Eriksson, O., Karis, O., Silva, T. J.   +22 more
openaire   +2 more sources

Ultrafast Demagnetization Through Femtosecond Generation of Non‐Thermal Magnons

Advanced Physics Research
AbstractUltrafast laser excitation of ferromagnetic metals gives rise to correlated, highly non‐equilibrium dynamics of electrons, spins and lattice, which are, however, poorly described by the widely‐used three‐temperature model. Here, a fully ab initio parameterized out‐of‐equilibrium theory based on a quantum kinetic approach – termed (N+2 ...
Markus Weißenhofer, Peter M. Oppeneer
openaire   +3 more sources