Zobrazeno 1 - 10
of 215
pro vyhledávání: '"Schmising, C"'
We demonstrate the coherent optical control of magnetization precession in a thin Ni film by a second excitation pulse which amplifies or attenuates the precession induced by a first pulse depending on the fluences of the pump-pulses and the pump-pum
Externí odkaz:
http://arxiv.org/abs/2311.04803
Autor:
Shallcross, S., Schmising, C. v. Korff, Elliott, P., Eisebitt, S., Dewhurst, J. K., Sharma, S.
Encoded in the transient x-ray absorption (XAS) and magnetic circular (MCD) response functions resides a wealth of information of the microscopic processes of ultrafast demagnetisation. Employing state of the art first principles dynamical simulation
Externí odkaz:
http://arxiv.org/abs/2207.11461
Autor:
Pontius, N., Dewhurst, J. K., Schuessler-Langeheine, C., Jana, S., Schmising, C. v. Korff, Eisebitt, S., Shallcross, S., Sharma, S.
Unveiling the key mechanisms that determine optically driven spin dynamics is essential both to probe the fundamental nature of ultrafast light-matter interactions, but also to drive future technologies of smaller, faster, and more energy efficient d
Externí odkaz:
http://arxiv.org/abs/2205.03172
Autor:
Dewhurst, J. K., Shallcross, Sam, Radu, I. E., Elliott, P., Schmising, C. v. Korff, Sharma, S.
Using an ultrashort laser pulse we explore {\it ab-initio} the spin dynamics of Gd$_x$(FeCo)$_{1-x}$ at femtosecond time scales. Optical excitations are found to drive charge from Fe majority $d$-states to the unoccupied Gd $f$-minority states, with
Externí odkaz:
http://arxiv.org/abs/2110.07180
Autor:
Shallcross, S., Dewhurst, J. K., Elliott, P., Eisebitt, S., Schmising, C. von Korff, Sharma, S.
In the highly non-equilibrium conditions of laser induced spin dynamics magnetic moments can only be obtained from the spectral information, most commonly from the spectroscopy of semi-core states using the so-called x-ray magnetic circular dichroism
Externí odkaz:
http://arxiv.org/abs/2104.01039
Autor:
Dewhurst, J. K., Shallcross, S., Elliott, P., Eisebitt, S., Schmising, C. v. Korff, Sharma, Sangeeta
Publikováno v:
Phys. Rev. B 104, 054438 (2021)
The dynamics of ultrafast demagnetisation in 3$d$ magnets is complicated by the presence of both spin ${\v S}$ and orbital ${\v L}$ angular momentum, with the microscopic mechanism by which the magnetic moment is redistributed to the lattice, and at
Externí odkaz:
http://arxiv.org/abs/2012.03657
Autor:
Hennes, M., Merhe, A., Liu, X., Weder, D., Schmising, C. von Korff, Schneider, M., Günther, C. M., Mahieu, B., Malinowski, G., Hehn, M., Lacour, D., Capotondi, F., Pedersoli, E., Nikolov, I. P., Chardonnet, V., Jal, E., Lüning, J., Vodungbo, B.
We use time-resolved x-ray resonant magnetic scattering (tr-XRMS) at the Co M$_{2,3}$- and Tb O$_1$-edges to study ultrafast demagnetization in an amorphous Co$_{88}$Tb$_{12}$ alloy with stripe domains. Combining the femtosecond temporal with nanomet
Externí odkaz:
http://arxiv.org/abs/2006.11246
Autor:
Dewhurst, J. K., Willems, F., Elliott, P., Li, Q. Z., Schmising, C. von Korff, Strueber, C., Engel, D. W., Eisebitt, S., Sharma, S.
Publikováno v:
Phys. Rev. Lett. 124, 077203 (2020)
In this work we combine theory and experiment to study transient magnetic circular dichroism (tr-MCD) in the extreme ultraviolet spectral range (XUV) in bulk Co and CoPt. We use the \emph{ab-initio} method of real-time time-dependent density function
Externí odkaz:
http://arxiv.org/abs/1909.00199
Autor:
Willems, F., Sharma, S., Schmising, C. v. Korff, Dewhurst, J. K., Salemi, L., Schick, D., Hessing, P., Strüber, C., Engel, W. D., Eisebitt, S.
Publikováno v:
Phys. Rev. Lett. 122, 217202 (2019)
We present theoretical and experimental data on the magneto-optical contributions to the complex refractive index in the extreme ultraviolet (XUV) range covering the 3p resonances of Fe, Co, and Ni. Comparing the spectra from density functional theor
Externí odkaz:
http://arxiv.org/abs/1812.06703
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