Results 111 to 120 of about 1,236 (182)

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

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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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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Applying Machine Learning to Elucidate Ultrafast Demagnetization Dynamics in Ni and Ni80Fe20 [PDF]

Understanding the correlation between fast and ultrafast demagnetization processes is crucial for elucidating the microscopic mechanisms underlying ultrafast demagnetization, which is pivotal for various applications in spintronics.
Baghbaderani, Hasan Ahmadian, Choi, Byoung-Chul   +1 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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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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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
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Heisenberg vs. Stoner : Probing the Microscopic Picture of Ultrafast Demagnetization using High Harmonics [PDF]

, 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
core  

Revealing angular momentum transfer channels and timescales in the ultrafast demagnetization process of ferromagnetic semiconductors. [PDF]

Proc Natl Acad Sci U S A, 2019
Chen Z, Luo JW, Wang LW.
europepmc   +1 more source