Zobrazeno 1 - 10
of 630
pro vyhledávání: '"Hellwig O."'
Autor:
Samad Fabian, Hellwig O.
Publikováno v:
Emergent Scientist, Vol 8, p 2 (2024)
Externí odkaz:
https://doaj.org/article/37ccdf950f90402cba5128262cc4b77f
Autor:
Ha, Nguyen T. N., Rasabathina, L., Hellwig, O., Sharma, A., Salvan, G., Yochelis, S., Paltiel, Y., Baczewski, L. T., Tegenkamp, C.
Polyalanine molecules (PA) with an {\alpha}-helix conformation gathered recently a lot of interest as the propagation of electrons through the chiral backbone structure comes along with spin polarization of the transmitted electrons. By means of scan
Externí odkaz:
http://arxiv.org/abs/2202.07417
Autor:
Hache, T., Li, Y., Weinhold, T., Scheumann, B., Gonçalves, F. J. T., Hellwig, O., Fassbender, J., Schultheiss, H.
We demonstrate a novel type of spin Hall nano-oscillator (SHNO) that allows for efficient tuning of magnetic auto-oscillations over an extended range of gigahertz frequencies, using bipolar direct currents at constant magnetic fields. This is achieve
Externí odkaz:
http://arxiv.org/abs/2003.11776
Free-standing and positionable microwave antenna device for magneto-optical spectroscopy experiments
Autor:
Hache, T., Vaňatka, M., Flajšman, L., Weinhold, T., Hula, T., Ciubotariu, O., Albrecht, M., Arkook, B., Barsukov, I., Fallarino, L., Hellwig, O., Fassbender, J., Urbánek, M., Schultheiss, H.
Publikováno v:
Phys. Rev. Applied 13, 054009 (2020)
Modern spectroscopic techniques for the investigation of magnetization dynamics in micro- and nano- structures or thin films use typically microwave antennas which are directly fabricated on top of the sample by means of electron-beam-lithography (EB
Externí odkaz:
http://arxiv.org/abs/1911.11517
Publikováno v:
Phys. Rev. B 100, 224408 (2019)
We investigate the ultrafast magnetization dynamics of FePt in the L10 phase after an optical heating pulse, as used in heat assisted magnetic recording. We compare continuous and nanogranular thin films and emphasize the impact of the finite size on
Externí odkaz:
http://arxiv.org/abs/1910.01413
Publikováno v:
Phys. Rev. B 101, 014403 (2020)
We study the spin-wave dynamics in nanoscale antidot lattices based on Co/Pd multilayers with perpendicular magnetic anisotropy. Using time-resolved magneto-optical Kerr effect measurements we demonstrate that the variation of the antidot shape intro
Externí odkaz:
http://arxiv.org/abs/1906.08109
Akademický článek
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Autor:
Sato, N., Schultheiss, K., Körber, L., Puwenberg, N., Mühl, T., Awad, A. A., Arekapudi, S. S. P. K., Hellwig, O., Fassbender, J., Schultheiss, H.
Publikováno v:
Phys. Rev. Lett. 123, 057204 (2019)
In the last decade, two revolutionary concepts in nano magnetism emerged from research for storage technologies and advanced information processing. The first suggests the use of magnetic domain walls (DWs) in ferromagnetic nanowires to permanently s
Externí odkaz:
http://arxiv.org/abs/1812.06702
Autor:
Hache, T., Weinhold, T., Schultheiss, K., Stigloher, J., Vilsmeier, F., Back, C., Arekapudi, S. S. P. K., Hellwig, O., Fassbender, J., Schultheiss, H.
We demonstrate a combined frequency and time domain investigation of injection-locked, constriction-based spin Hall nano-oscillators by Brillouin light scattering (BLS) and time-resolved magneto-optical Kerr effect (TR-MOKE). This was achieved by app
Externí odkaz:
http://arxiv.org/abs/1811.08133
Autor:
Takahashi, Y. K., Medapalli, R., Kasai, S., Wang, J., Ishioka, K., Wee, S. H., Hellwig, O., Hono, K., Fullerton, E. E.
Publikováno v:
Phys. Rev. Applied 6, 054004 (2016)
Manipulation of the magnetization by external energies other than magnetic field, such as spin-polarized current1-4, electric voltage5,6 and circularly polarized light7-11 gives a paradigm shift in magnetic nanodevices. Magnetization control of ferro
Externí odkaz:
http://arxiv.org/abs/1604.03488