Results 71 to 80 of about 92,951 (162)

Element resolved evidence of superdiffusive terahertz spin current arising from ultrafast demagnetization process

, 2023
Using element-specific measurements of the ultrafast demagnetization of Ru/Fe65Co35 hetero-structures, we show that Ru can exhibit a significant magnetic contrast (3% asymmetry) resulting from ultrafast spin currents emanating from the demagnetization ...
O. Karis, Svedlindh, Peter, Oppeneer, P. M.,, Stefanuik, Robert,, Söderström, Johan,, Mardegan, J. R.L., Knut, R.,, P. Svedlindh, Gupta, R.,, Malik, Rameez Saeed, Stefanuik, R.,, B. Sanyal, Sanyal, B., Oppeneer, Peter M.,, Chen, X.,, Oppeneer, P. M., S. Saha, S. Francoual, T. Pohlmann, Söderström, Johan, Cosco, F.,, Karis, Olof,, Svedlindh, P.,, Francoual, S., A. Ghosh, Ghosh, A., R. Gupta, Chen, Xin, Malik, R. S., R. Stefanuik, Saha, S., Cosco, F., Pohlmann, T.,, Oppeneer, Peter M., Sanyal, B.,, Lund University., R. Knut, Söderström, J.,, Ghosh, Anirudha,, Chen, X., Svedlindh, Peter,, Francoual, S.,, Pohlmann, T., Mardegan, J. R.L.,, Sanyal, Biplab, Knut, Ronny,, Saha, S.,, R. S. Malik, Mardegan, J. R. L., Karis, O., J. Söderström, Gupta, R., Gupta, Rahul,, Knut, Ronny, P. M. Oppeneer, Ghosh, A.,, Svedlindh, P., F. Cosco, Cosco, Francesco; id_orcid, Karis, O.,, Knut, R., Sanyal, Biplab,, Gupta, Rahul, Malik, R. S.,, J. R. L. Mardegan, Malik, Rameez Saeed,, Stefanuik, Robert, Chen, Xin,, Saha, Susmita,, Saha, Susmita, Stefanuik, R., Karis, Olof, X. Chen, Ghosh, Anirudha, Soderstrom, J.   +74 more
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Femtosecond X-ray induced changes of the electronic and magnetic response of solids from electron redistribution

Nature Communications, 2019
X-ray free electron lasers allow for studying the interaction of magnetic materials with intense X-rays beyond a linear response regime. Here, the authors demonstrate the onset of X-ray induced ultrafast demagnetization in Co/Pd multilayers via a ...
Daniel J. Higley, Alex H. Reid, Zhao Chen, Loïc Le Guyader, Olav Hellwig, Alberto A. Lutman, Tianmin Liu, Padraic Shafer, Tyler Chase, Georgi L. Dakovski, Ankush Mitra, Edwin Yuan, Justine Schlappa, Hermann A. Dürr, William F. Schlotter, Joachim Stöhr   +15 more
doaj   +1 more source

Ultrafast strain engineering and coherent structural dynamics from resonantly driven optical phonons in LaAlO3

npj Quantum Materials, 2020
Strain engineering has been extended recently to the picosecond timescales, driving ultrafast metal–insulator phase transitions and the propagation of ultrasonic demagnetization fronts.
J. R. Hortensius, D. Afanasiev, A. Sasani, E. Bousquet, A. D. Caviglia   +4 more
doaj   +1 more source

Investigating the contribution of superdiffusive transport to ultrafast demagnetization of ferromagnetic thin films [PDF]

, 2013
We experimentally investigate to what extent superdiffusive spin transport contributes to the ultrafast demagnetization of ferromagnets by pumping Ni thin films from the front side and back side of the sample.
A. J. Schellekens, Schellekens, A.J., T. N. Vader, Koopmans, B., W. Verhoeven, Verhoeven, W., Vader, T.N., B. Koopmans   +7 more
core   +1 more source

Transient ferromagnetic state induced by ultrafast suppression of interlayer exchange coupling in synthetic antiferromagnets [PDF]

APL Materials
The increasing demand for faster, denser, and low-power memory technologies has intensified interest in antiferromagnetic materials for ultrafast spintronic applications.
Guanqi Li, Youzhi Gu, Jiajun Li, Junlin Wang, Zhendong Chen, Richard F. L. Evans, Roy Chantrell, Jing Wu, Yongbing Xu   +8 more
doaj   +1 more source

Detection of femtosecond spin voltage pulses in a thin iron film

Structural Dynamics, 2020
We present experimental evidence of a spin voltage—a difference between the chemical potentials of the two spin directions—in a thin iron film based on spin- and time-resolved photoemission spectroscopy.
K. Bühlmann, G. Saerens, A. Vaterlaus, Y. Acremann   +3 more
doaj   +1 more source

Ultrafast Demagnetization Control in Magnetophotonic Surface Crystals

Magnetic memory combining plasmonics and magnetism is poised to dramatically increase the bit density and energy efficiency of light-assisted ultrafast magnetic storage, thanks to nanoplasmon-driven enhancement and confinement of light.
Alexandre Dmitriev (1278720), Kshiti Mishra (14044986), Vassilios Kapaklis (8305236), Andrei Kirilyuk (1409059), Agne Ciuciulkaite (8305221), Alexey V. Kimel (1511626), Richard M. Rowan-Robinson (14044989), Carl S. Davies (14044992)   +7 more
core   +1 more source

Ultrafast spin demagnetization by nonthermal electrons of TbFe alloy film

, 2009
An ultrafast spin demagnetization process of an amorphous Tb(35)Fe(65) alloy film has been investigated by means of an all-optical pump-probe technique.
Jeong, Jae-Woo, Shin, Sung-Chul, Sung-Chul Shin, Ji-Wan Kim, Kim, Ji-Wan, Kyeong-Dong Lee, Jae-Woo Jeong, Lee, Kyeong-Dong   +7 more
core   +1 more source

Ultrafast demagnetization in buried Co80Dy20 as fingerprint of hot-electron transport [PDF]

The generation of ultrashort hot-electron pulses in metallic heterostructures offers attractive perspectives for the ultrafast spin manipulation on the picosecond time scale.
Bergeard, N. (Nicolas), Guyader, L. Le, Terrier, E. (Erwan), Ferté, T. (Tom), Malinowski, G., Holldack, K., Hehn, M., Boeglin, C. (Christine)   +7 more
core   +1 more source

Ultrafast magnetization enhancement via the dynamic spin-filter effect of type-II Weyl nodes in a kagome ferromagnet

Nature Communications
The magnetic type-II Weyl semimetal (MWSM) Co3Sn2S2 has recently been found to host a variety of remarkable phenomena including surface Fermi-arcs, giant anomalous Hall effect, and negative flat band magnetism.
Xianyang Lu, Zhiyong Lin, Hanqi Pi, Tan Zhang, Guanqi Li, Yuting Gong, Yu Yan, Xuezhong Ruan, Yao Li, Hui Zhang, Lin Li, Liang He, Jing Wu, Rong Zhang, Hongming Weng, Changgan Zeng, Yongbing Xu   +16 more
doaj   +1 more source