Results 1 to 10 of about 406 (125)

Ultrafast Demagnetization Control in Magnetophotonic Surface Crystals [PDF]

Nano Letters, 2022
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. Here we devise a new path for that, simultaneously enabling light-driven bit downscaling, reduction of the required ...
Kshiti Mishra, Richard M Rowan-Robinson, Agne Čiučiulkaitė   +2 more
exaly   +6 more sources

Indirect excitation of ultrafast demagnetization. [PDF]

Sci Rep, 2016
AbstractDoes the excitation of ultrafast magnetization require direct interaction between the photons of the optical pump pulse and the magnetic layer? Here, we demonstrate unambiguously that this is not the case. For this we have studied the magnetization dynamics of a ferromagnetic cobalt/palladium multilayer capped by an IR-opaque aluminum layer ...
Vodungbo B, Tudu B, Perron J, Delaunay R, Müller L, Müller L, Berntsen MH, Grübel G, Malinowski G, Weier C, Gautier J, Lambert G, Zeitoun P, Gutt C, Jal E, Reid AH, Granitzka PW, Jaouen N, Dakovski GL, Moeller S, Minitti MP, Mitra A, Carron S, Pfau B, von Korff Schmising C, Schneider M, Eisebitt S, Lüning J.   +27 more
europepmc   +9 more sources

Ultrafast demagnetization in iron: Separating effects by their nonlinearity. [PDF]

Struct Dyn, 2018
The laser-driven ultrafast demagnetization effect is one of the long-standing problems in solid-state physics. The time scale is given not only by the transfer of energy, but also by the transport of angular momentum away from the spin system. Through a double-pulse experiment resembling two-dimensional spectroscopy, we separate the different pathways ...
Bühlmann K, Gort R, Salvatella G, Däster S, Fognini A, Bähler T, Dornes C, Vaz CAF, Vaterlaus A, Acremann Y.   +9 more
europepmc   +9 more sources

Ultrafast demagnetization in a ferrimagnet under electromagnetic field funneling. [PDF]

Nanoscale, 2021
Bottom-up produced optical ring-shaped Ag nanoantennas efficiently funnel electromagnetic field of a femtosecond-pulsed laser light into a ferrimagnetic TbCo nanofilm at plasmon resonance. This leads to the TbCo demagnetization at the nanoscale.
Mishra K, Ciuciulkaite A, Zapata-Herrera M, Vavassori P, Kapaklis V, Rasing T, Dmitriev A, Kimel A, Kirilyuk A.   +8 more
europepmc   +7 more sources

Polarized phonons carry angular momentum in ultrafast demagnetization [PDF]

Nature, 2022
Ultrafast electron diffraction from nickel reveals that ultrafast demagnetization and the associated Einstein-de Haas effect proceed via polarized phonons and atomic motions on circular trajectories.
Mikhail Volkov, Daniel Kazenwadel, Hannah Lange   +2 more
exaly   +3 more sources

Corrigendum: Indirect excitation of ultrafast demagnetization. [PDF]

Sci Rep, 2016
Scientific Reports 6: Article number: 18970; published online: 06 January 2016; updated: 04 March 2016 The original version of this Article contained a typographical error in the spelling of the author Bharati Tudu, which was incorrectly given as Bahrati Tudu. This has now been corrected in the PDF and HTML versions of the Article.
Vodungbo B, Tudu B, Perron J, Delaunay R, Müller L, Berntsen MH, Grübel G, Malinowski G, Weier C, Gautier J, Lambert G, Zeitoun P, Gutt C, Jal E, Reid AH, Granitzka PW, Jaouen N, Dakovski GL, Moeller S, Minitti MP, Mitra A, Carron S, Pfau B, von Korff Schmising C, Schneider M, Eisebitt S, Lüning J.   +26 more
europepmc   +4 more sources

Three-stage ultrafast demagnetization dynamics in a monolayer ferromagnet. [PDF]

Nat Commun
AbstractIntense laser pulses can be used to demagnetize a magnetic material on an extremely short timescale. While this ultrafast demagnetization offers the potential for new magneto-optical devices, it poses challenges in capturing coupled spin-electron and spin-lattice dynamics.
Wu N, Zhang S, Chen D, Wang Y, Meng S.
europepmc   +4 more sources

Ultrafast Laser-Induced Interatomic Forces in Magnetostrictive Metals. [PDF]

Adv Sci (Weinh)
This study reports ultrafast changes in the interatomic forces generated by femtosecond laser excitation in magnetostrictive FeGa thin films. This ultrafast process manifests as an optical birefringence signal lasting ≈400 fs. Using a pump‐probe system, the femtosecond evolution of this nonequilibrium interatomic interaction is visualized, providing ...
Zeng X, Zhang L, Huang Y, Fang Q, Niu Y, Wen Q, Yan P, Chen Z, Zhong Z, Jin L.   +9 more
europepmc   +2 more sources

Atomically Resolved Acoustic Dynamics Coupled with Magnetic Order in a Van der Waals Antiferromagnet. [PDF]

Adv Mater
Magnetically coupled acoustic phonon modes (f1, f2, f3) are captured by ultrafast X‐ray diffraction in a prototypical van der Waals antiferromagnet FePS3, including their atomic displacement vectors (u) and the acoustic propagation wave vectors (k). Notably, the atomic displacement vector and amplitude of these modes, represented by the direction and ...
Zhou F, Hwangbo K, Ha SS, Zhang XW, Chun SH, Park J, Eom I, Jiang Q, Yang Z, Zajac M, Kim S, Choi S, Chu Z, Oh KH, Su Y, Zong A, Santos EJG, Cao T, Chu JH, Hruszkewycz SO, Gedik N, Xiao D, Kim H, Xu X, Wen H.   +24 more
europepmc   +2 more sources

Ultrafast Terahertz Field Control of the Emergent Magnetic and Electronic Interactions at Oxide Interfaces. [PDF]

Adv Mater
Intense single‐cycle THz electric‐field pulses enable ultrafast control of emergent electronic and magnetic states at LaNiO3/CaMnO3 interfaces. Combined X‐ray and optical probes reveal sub‐picosecond demagnetization driven by spin‐polarized currents and slower magnetoelastic dynamics linked to spin–lattice coupling.
Derrico AM, Basini M, Unikandanunni V, Paudel JR, Kareev M, Terilli M, Wu TC, Alostaz A, Klewe C, Shafer P, Gloskovskii A, Schlueter C, Schneider CM, Chakhalian J, Bonetti S, Gray AX.   +15 more
europepmc   +2 more sources