Zobrazeno 1 - 10
of 142
pro vyhledávání: '"Johansen, Tom H."'
Excitation and propagation dynamics of spin waves in an iron-based garnet film under out-of-plane magnetic field were investigated by time-resolved magneto-optical imaging. The experimental results and the following data analysis by phase-resolved sp
Externí odkaz:
http://arxiv.org/abs/2003.05159
We investigate the directional locking effects that arise when a monolayer of paramagnetic colloidal particles is driven across a triangular lattice of magnetic bubbles. We use an external rotating magnetic field to generate a two dimensional traveli
Externí odkaz:
http://arxiv.org/abs/2001.06897
We report experimental observation of the refraction and re ection of propagating magnetostatic spin waves crossing a 90-degree domain wall (DW) in terms of time-resolved magneto-optical imaging. Due to the magnetization rotation across the 90-degree
Externí odkaz:
http://arxiv.org/abs/1911.10659
Publikováno v:
Nano Letters 16, 8, 5169-5175 (2016)
We demonstrate a general and robust method to confine on a plane strongly diffusing submicrometer particles in water by using size tunable magnetic channels. These virtual conduits are realized with pairs of movable Bloch walls (BWs) located within a
Externí odkaz:
http://arxiv.org/abs/1908.05039
We have investigated optically-excited magnetoelastic waves by phase-resolved spin-wave tomography (PSWaT). PSWaT reconstructs dispersion relation of spin waves together with their phase information by using time-resolved magneto-optical imaging for
Externí odkaz:
http://arxiv.org/abs/1803.07697
The propagation dynamics of spin waves are represented by their dispersion relations. Recently, we have developed a method, called spin-wave tomography (SWaT), to obtain dispersion relation of spin waves in the long wavelength regime, so-called pure
Externí odkaz:
http://arxiv.org/abs/1712.00927
Autor:
Hashimoto, Yusuke, Bossini, Davide, Johansen, Tom H., Saitoh, Eiji, Kirilyuk, Andrei, Rasing, Theo
Publikováno v:
Phys. Rev. B 97, 140404 (2018)
Using spin-wave tomography (SWaT), we have investigated the excitation and the propagation dynamics of optically-excited magnetoelastic waves, i.e. hybridized modes of spin waves and elastic waves, in a garnet film. By using time-resolved SWaT, we re
Externí odkaz:
http://arxiv.org/abs/1710.08087
Autor:
Martinez-Pedrero, Fernando, Massana-Cid, Helena, Ziegler, Till, Johansen, Tom H., Straube, Arthur V., Tierno, Pietro
Publikováno v:
Phys. Chem. Chem. Phys. 18, 26353 (2016)
We demonstrate a size sensitive experimental scheme which enables bidirectional transport and fractionation of paramagnetic colloids in a fluid medium. It is shown that two types of magnetic colloidal particles with different sizes can be simultaneou
Externí odkaz:
http://arxiv.org/abs/1610.04380
Publikováno v:
Lab Chip 15, 1765 (2015)
Colloidal inclusions in lab-on-a-chip devices can be used to perform analytic operations in a non-invasive fashion. We demonstrate here a novel approach to realize fast and reversible micro-sieving operations by manipulating and transporting colloida
Externí odkaz:
http://arxiv.org/abs/1601.01030
Publikováno v:
Appl. Phys. Lett. 104, 174102 (2014)
We report a technique to realize reconfigurable colloidal crystals by using the controlled motion of particle defects above an externally modulated magnetic substrate. The transport of particles is induced by applying a uniform rotating magnetic fiel
Externí odkaz:
http://arxiv.org/abs/1507.01964