Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Nadvornik, L."'
Autor:
Wohlrath, V., Sadeghi, Z., Kimák, J., Hovořáková, K., Kubaščík, P., Schmoranzerová, E., Nádvorník, L., Trojánek, F., Němec, P., Ostatnický, T.
We present a method for a precise determination of magnetic anisotropy and anisotropy of quadratic magneto-optical response of thin films of ferromagnetic and ferrimagnetic materials. The method is based on measurements of a magneto-optical response
Externí odkaz:
http://arxiv.org/abs/2409.20205
Autor:
Surynek, M., Zubac, J., Olejnik, K., Farkas, A., Krizek, F., Nadvornik, L., Kubascik, P., Trojanek, F., Campion, R. P., Novak, V., Jungwirth, T., Nemec, P.
Previous experiments in compensated magnets have demonstrated a potential for approaching the limit of fastest and least-dissipative operation of digital memory bits. However, the analog route has been virtually unexplored at (sub)ps time scales. In
Externí odkaz:
http://arxiv.org/abs/2401.17370
Autor:
Rouzegar, R., Wahada, M. A., Chekhov, A. L., Hoppe, W., Jechumtal, J., Nadvornik, L., Wolf, M., Seifert, T. S., Parkin, S. S. P., Woltersdorf, G., Brouwer, P. W., Kampfrath, T.
We study femtosecond spin currents through MgO tunneling barriers in CoFeB(2 nm)|MgO($d$)|Pt(2 nm) stacks by terahertz emission spectroscopy. To obtain transport information independent of extrinsic experimental factors, we determine the complex-valu
Externí odkaz:
http://arxiv.org/abs/2305.09074
Autor:
Heitz, J. J. F., Nádvorník, L., Balos, V., Behovits, Y., Chekhov, A. L., Seifert, T. S., Olejník, K., Kašpar, Z., Geishendorf, K., Novák, V., Campion, R. P., Wolf, M., Jungwirth, T., Kampfrath, T.
We show scalable and complete suppression of the recently reported terahertz-pulse-induced switching between different resistance states of antiferromagnetic CuMnAs thin films by ultrafast gating. The gating functionality is achieved by an optically
Externí odkaz:
http://arxiv.org/abs/2106.08828
Autor:
Rouzegar, R., Brandt, L., Nadvornik, L., Reiss, D. A., Chekhov, A. L., Gueckstock, O., In, C., Wolf, M., Seifert, T. S., Brouwer, P. W., Woltersdorf, G., Kampfrath, T.
Laser-induced terahertz spin transport (TST) and ultrafast demagnetization (UDM) are central but so far disconnected phenomena in femtomagnetism and terahertz spintronics. Here, we use broadband terahertz emission spectroscopy to reliably measure bot
Externí odkaz:
http://arxiv.org/abs/2103.11710
Publikováno v:
New J. Phys. 22, 093065 (2020)
We report on a quasi-nondegenerate pump-probe technique that is based on spectral-filtration of femtosecond laser pulses by a pair of mutually-spectrally-disjunctive interference filters. This cost- and space-efficient approach can be used even in pu
Externí odkaz:
http://arxiv.org/abs/2004.03311
Autor:
Janda, T., Nadvornik, L., Kucharik, J., Butkovicova, D., Schmoranzerova, E., Trojanek, F., Nemec, P.
In this work we describe an experimental setup for spatially-resolved pump-probe experiment with integrated wide-field magneto-optical (MO) microscope. The MO microscope can be used to study ferromagnetic materials with both perpendicular-to-plane an
Externí odkaz:
http://arxiv.org/abs/1802.10534
Autor:
Seifert, T. S., Jaiswal, S., Barker, J., Weber, S. T., Razdolski, I., Cramer, J., Gueckstock, O., Maehrlein, S., Nadvornik, L., Watanabe, S., Ciccarelli, C., Melnikov, A., Jakob, G., Münzenberg, M., Goennenwein, S. T. B., Woltersdorf, G., Rethfeld, B., Brouwer, P. W., Wolf, M., Kläui, M., Kampfrath, T.
Understanding the transfer of spin angular momentum is essential in modern magnetism research. A model case is the generation of magnons in magnetic insulators by heating an adjacent metal film. Here, we reveal the initial steps of this spin Seebeck
Externí odkaz:
http://arxiv.org/abs/1709.00768
Autor:
Nádvorník, L., Surýnek, M., Olejník, K., Novák, V., Wunderlich, J., Trojánek, F., Jungwirth, T., Němec, P.
Publikováno v:
Phys. Rev. Applied 8, 034022 (2017)
We report on a picosecond-fast optical removal of spin polarization from a self-confined photo-carrier system at an undoped GaAs/AlGaAs interface possessing superior long-range and high-speed spin transport properties. We employed a modified resonant
Externí odkaz:
http://arxiv.org/abs/1705.10627
Autor:
Nádvorník, L., Haigh, J. A., Olejník, K., Irvine, A. C., Novák, V., Jungwirth, T., Wunderlich, J.
Publikováno v:
Phys. Rev. B 91, 125205 (2015)
We report an experimental demonstration of a local amplification of the spin Hall voltage using an expanding depletion zone at a pn-junction in GaAs/AlGaAs Hall-bar microdevices. It is demonstrated that the depletion zone can be spatially expanded by
Externí odkaz:
http://arxiv.org/abs/1605.04116