Results 91 to 100 of about 92,951 (162)

Heisenberg vs. Stoner : Probing the Microscopic Picture of Ultrafast Demagnetization using High Harmonics

, 2017
We uncover the multiple mechanisms underlying laser-driven demagnetization in cobalt using a tabletop high harmonic source. Ultrafast magnon excitation, as well as a transient reduction of the exchange splitting, are both important on femtosecond ...
Carva, Karel,, Silva, Thomas,, Shaw, Justin,, Zusin, Dmitriy,, Mathias, Stefan,, Mumane, Margaret,, Grychtol, Patrik,, Nembach, Hans,, Oppeneer, Peter,, Turgut, Emrah,, Schneider, Claus M.,, Aeschlimann, Martin,, Tengdin, Phoebe,, Legut, Dominik,, Gentry, Christian,, Kapteyn, Henry,   +15 more
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Accelerated ultrafast demagnetization of an interlayer exchange coupled Co Mn Co trilayer [PDF]

We investigate the ultrafast magnetization dynamics of an interlayer exchange coupled Co Mn Co trilayer system after excitation with an ultrafast optical pump.
Kumberg, I., Gordes, J., Kuch, W., Pontius, N., Sharma, S., Schüssler Langeheine, C., Awsaf, C.S., Shinwari, T., Walter, M., Thakur, S.   +9 more
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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   +2 more sources

Intrinsically energy-dependent spin dynamics in ultrafast demagnetization

Communications Physics
Ultrafast magnetization dynamics has the potential to spark a new era of information technology by harnessing the interaction between spin and light. Recent studies indicate a complex interplay between the microscopic spin and band structure dynamics and
Christopher Seibel, Tobias Held, Markus Uehlein, Sebastian T. Weber, Baerbel Rethfeld   +4 more
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Ultrafast laser induced magnetization reversal in L10 FePt films with different chemical orders

AIP Advances, 2019
Using an ultrafast laser pulse as a substitution of continuous-wave laser to excite a magnetic film leads to high spin temperature and fast demagnetization, beneficial to the rapid and efficient photo-assisted magnetization (M) reversal.
J. Y. Shi, X. F. Hu, M. Tang, J. Xu, L. Q. Shen, S. M. Zhou, X. J. Yang, Y. Z. Wu, L. Y. Chen, H. B. Zhao   +9 more
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Laser induced ultrafast demagnetization in diluted magnetic semiconductor nanostructures

, 2009
International audienceWe present a dynamical model that reproduces the observed time evolution of the magnetization in diluted magnetic semiconductor films after weak laser excitation.
Morandi, Omar, G. Manfredi, O. Morandi, Hervieux, Paul-Antoine, P.-A. Hervieux, Manfredi, Giovanni, Hervieux, P. (Paul-Antoine), Morandi, O. (Omar), Manfredi, G. (Giovanni)   +8 more
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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
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Charge and spin current pumping by ultrafast demagnetization dynamics [PDF]

The surprising discovery of ultrafast demagnetization -- where electric field of femtosecond laser pulse couples to electrons of a ferromagnetic (FM) layer causing its magnetization vector {\em to shrink while not rotating}, is also assumed to be ...
Jungfleisch, M. Benjamin, Kefayati, Ali, Xiao, John Q., Varela-Manjarres, Jalil, Nikolic, Branislav K.   +4 more
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Comparative Study of Laser-Induced Ultrafast Demagnetization Dynamics in Fe, Co, and Ni [PDF]

, 2016
Even twenty years after the discovery of ultrafast demagnetization of ferromagnetic materials induced by a femtosecond laser pulse there is still an ongoing debate about the mechanisms that drive the process.
Gopalakrishnan, Maithreyi
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Enhancing optically induced intersite spin transfer in antiferromagnetic-ferromagnetic ultrathin films

Physical Review Research
Antiferromagnetic (AFM) films play a crucial role in advanced spintronic devices by regulating adjacent ferromagnetic (FM) layers via interfacial exchange coupling. However, the impact of antiferromagnets on magnetic dynamics of FM films under ultrashort
Ming-Shian Tsai, Li-Han Chang, Chun-Chia Tseng, Kunchala Ramesh Babu, Guang-Yu Guo, Bo-Yao Wang, Ming-Chang Chen   +6 more
doaj   +1 more source