Results 61 to 70 of about 92,951 (162)

Ultrafast demagnetization of Pt magnetic moment in L10-FePt probed by magnetic circular dichroism at a hard x-ray free electron laser

New Journal of Physics, 2019
Unraveling the origin of ultrafast demagnetization in multisublattice ferromagnetic materials requires femtosecond x-ray techniques to trace the magnetic moment dynamics on individual elements, but this could not yet be achieved in the hard x-ray regime.
Kohei Yamamoto, Yuya Kubota, Motohiro Suzuki, Yasuyuki Hirata, Karel Carva, Marco Berritta, Kou Takubo, Yohei Uemura, Ryo Fukaya, Kenta Tanaka, Wataru Nishimura, Takuo Ohkochi, Tetsuo Katayama, Tadashi Togashi, Kenji Tamasaku, Makina Yabashi, Yoshihito Tanaka, Takeshi Seki, Koki Takanashi, Peter M Oppeneer, Hiroki Wadati   +20 more
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Ultrafast behavior of induced and intrinsic magnetic moments in CoFeB/Pt bilayers probed by element-specific measurements in the extreme ultraviolet spectral range

Physical Review Research, 2023
The ultrafast and element-specific response of magnetic systems containing ferromagnetic 3d transition metals and 4d/5d heavy metals is of interest both from a fundamental as well as an applied research perspective.
Clemens von Korff Schmising, Somnath Jana, Kelvin Yao, Martin Hennecke, Philippe Scheid, Sangeeta Sharma, Michel Viret, Jean-Yves Chauleau, Daniel Schick, Stefan Eisebitt   +9 more
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Beyond a phenomenological description of magnetostriction

Nature Communications, 2018
Although magnetostriction is universal in magnetic materials, understanding its microscopic origin remains challenging. Here the authors use X-ray and ultrafast electron diffraction to separate the material’s sub-picosecond spin and lattice responses and
A. H. Reid, X. Shen, P. Maldonado, T. Chase, E. Jal, P. W. Granitzka, K. Carva, R. K. Li, J. Li, L. Wu, T. Vecchione, T. Liu, Z. Chen, D. J. Higley, N. Hartmann, R. Coffee, J. Wu, G. L. Dakovski, W. F. Schlotter, H. Ohldag, Y. K. Takahashi, V. Mehta, O. Hellwig, A. Fry, Y. Zhu, J. Cao, E. E. Fullerton, J. Stöhr, P. M. Oppeneer, X. J. Wang, H. A. Dürr   +30 more
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Photon energy-dependent ultrafast magnetization dynamics in magnetic heterostructures

Communications Materials
Laser-induced ultrafast demagnetization has traditionally been understood as a process in which photon absorption excites nonequilibrium electrons, leading to demagnetization followed by magnetization recovery.
In Cheol Yu, San Ko, Won Tae Kim, Byong-Guk Park, Byoung S. Ham, Kab-Jin Kim, Fabian Rotermund   +6 more
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Imaging ultrafast multiferroic dynamics in BiFeO3 [PDF]

APL Materials
The sub-picosecond control of ferroic orders represents a key frontier in the development of next-generation ultrafast technologies. Among the various prototypical systems, magnetoelectric multiferroic materials, exhibiting coupled ferroelectric and ...
A. Levchuk, S. Fusil, T. Chirac, V. Garcia, M. Viret, J.-Y. Chauleau   +5 more
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Manipulation of Magnetization Switching by Ultrafast Spin‐Polarized Hot‐Electron Transport in Synthetic Antiferromagnet

Advanced Electronic Materials, 2023
Uncovering the physical mechanisms that govern ultrafast charge and spin dynamics is becoming indispensable both at the fundamental level and to develop future spin‐based electronics. Recently it has been shown that femtosecond pulsed‐laser excitation of
Meiyang Ma, Zhuoyi Li, Xuezhong Ruan, Jing Wu, Ruifeng Wang, Tianyu Liu, Jun Du, Xianyang Lu, Yongbing Xu   +8 more
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Wavelength scaling of ultrafast demagnetization in Co/Pt multilayers

, 2020
International audienceUltrafast demagnetization, a phenomenon of utmost interest in the context of optical control of magnetically recorded data, has been extensively studied in a variety of different materials.
Lüning, Jan, Cardin, Vincent; orcid:, Vodungbo, Boris, Jal, Emmanuelle; orcid:, Cardin, Vincent, Légaré, François, Varin, Charles, Balciunas, Tadas, Ibrahim, Heide, Jal, Emmanuelle, Légaré, Katherine, Ibrahim, Heide; orcid:, Baltuska, Andrius, Jaouen, Nicolas   +13 more
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Energy Efficient Control of Ultrafast Spin Current to Induce Single Femtosecond Pulse Switching of a Ferromagnet

Advanced Science, 2020
New methods to induce magnetization switching in a thin ferromagnetic material using femtosecond laser pulses without the assistance of an applied external magnetic field have recently attracted a lot of interest.
Quentin Remy, Junta Igarashi, Satoshi Iihama, Grégory Malinowski, Michel Hehn, Jon Gorchon, Julius Hohlfeld, Shunsuke Fukami, Hideo Ohno, Stéphane Mangin   +9 more
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Ab Initio Nonadiabatic Molecular Dynamics of Ultrafast Demagnetization in Iron

Ultrafast demagnetization in magnetic metals is the key to spintronics devices. Taking iron as a prototypical system, we investigate the demagnetization mechanism by simulating the charge and spin dynamics using nonadiabatic molecular dynamics in the ...
Haoran Lu (6389621), Run Long (1304349)
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Longitudinal evolution of magnetization of ferromagnets following ultrafast demagnetization: Role of finite size and shape of demagnetized region

Condensed Matter Physics, 2014
A dependence of a relaxation rate on the shape of the demagnetized region for a longitudinal evolution of total magnetization to its equilibrium value following the ultrafast demagnetization is demonstrated. This shape-dependence is caused by a motion of
I.A. Yastremsky
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