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Showing 1 to 20 of 24 for “"MOKE"”.
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Magnetooptische Untersuchungen an ferromagnetischen GaMnAs-Epitaxieschichten
… mit Hilfe des magnetooptischen Kerr-Effektes (MOKE) und des magnetischen Zirkular-Dichroismus (MCD) untersucht. Der Temperaturbereich erstreckt sich dabei von 1,9K bis zu 100K und das senkrecht zur Schichtebene orientierte Magnetfeld liegt zwischen -5 und +5 kOe. Um sowohl den MOKE als auch den …
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Low temperature Kerr effect study of magnetic topological insulators and other magnetic structures
… an emphasis on the magneto-optic Kerr effect (MOKE) characterisation. The design and construction of a MOKE microscope is described, for simultaneous magneto-optical and magneto-transport measurements in an applied field of up to 9 T at temperatures from 1.5 to 300 K. This microscope is used to …
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Micromagnetic modelling and magneto-optical characterization of Ni/V2O3 hybrid structures
… on sapphire, Al2O3, were investigated using MOKE (magneto-optic Kerr effect). Three samples show a fourfold symmetry in coercivity with very small but similar change in magnetic remanence. For comparison micromagnetic simulations were done in Mumax3. The samples have a well defined growth …
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Magnetooptische Untersuchungen an ferromagnetischen III-V-Halbleitern
… mittels des magnetooptischen Kerr-Effekts (MOKE) und des magnetischen Zirkulardichroismus (MCD) untersucht. Die gemessenen Signalhöhen sind proportional zur Magnetisierung. Damit war es möglich, Hystereseschleifen aufzuzeichnen. Obwohl zu erwarten wäre, dass magnetische Eigenschaften von …
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Ultrathin films on semiconductor substrates : growth, magneto-optical characteristics and spin injection
… applicable to the magneto-optical Kerr effect(MOKE) measurement. MOKE was utilised to study the magnetic properties of theseultrathin Ni, Fe films on various GaAs substrates.An investigation on the spin injection processes in ferromagnetic metalsemiconductorheterostructures was carried out …
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Magnetic and thermal properties of metallic antiferromagnetic materials
… The linear magneto-optic Kerr effect (MOKE) is often used to probe magnetism of ferromagnetic materials, but MOKE cannot be applied to collinear antiferromagnets due to the cancellation of sublattice magnetization. Magneto-optic constants that are quadratic in magnetization, however, …
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Ultrafast magnetization dynamics of lanthanide metals and alloys
… (XMCD), the magneto-optical Kerr effect (MOKE) and magnetic second harmonic generation (MSHG). The magnetization dynamics is analyzed from the time scale of a few fs up to several hundred picoseconds (ps). The contributions of electrons, phonons, spin fluctuations, as well as the temporal …
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Optical studies of current-induced spin-orbit effects in magnetic systems
… system based on the magneto-optic Kerr effect (MOKE). With the help of this sensitive system, we find an anomalous spin-orbit torque (ASOT) at the surfaces of single-layer magnetic thin films. Following the insight provided by the single-layer findings, we further demonstrate self-spin-orbit …
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Non-ideal exchange springs in DyFe2/YFe2 superlattices
… using the magneto-optic Kerr effect (MOKE), at room temperature. This work was also complimented by 1D computer simulations, involving numerical solution of the Landau-Lifshitz-Gilbert equations. In contrast to the well accepted low-temperature behaviour, both the MOKE and computer …
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Investigation of Anisotropic Heat Transport Through Frequency Domain Thermoreflectance Technique
… frequency domain magneto-optical Kerr effect (FD-MOKE) used to measure the anisotropic thermal properties with enhanced sensitivity. Monte Carlo computational method is also explained for uncertainty calculations. Finally, the demonstrations of measuring in-plane and out-of-plane thermal …
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The c33 elastic constant of MoS2 as a function of pressure and the deposition of multilayer thin films by sputtering
… in time-resolved magneto-optical Kerr effect (TR-MOKE) experiments is also discussed, along with the preliminary film and transducer characterization. Four-point probe measurements of the thin films indicated high resistivities corresponding to roughness or small grain size. A multilayer …
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Optical control and probe of ferromagnetic and ferroic orders in films, heterostructures, and perovskite-based material systems
… time-resolved magneto-optical Kerr effect (TR-MOKE), we observed clear magnetic precession (on the order of a few GHz) with magnetic precession angle increasing (up to 4.5 degrees) for thinner Co samples which demonstrated stronger PMA. We observed a clear connection between PMA strength and …
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TIME-DOMAIN INVESTIGATION OF ACOUSTICALLY AND THERMALLY DRIVEN MAGNONS
… employing tr-Magneto-Optical Kerr Effect (MOKE), implemented in the same setup, as a function of both the external magnetic field and the temperature. The presented results provide insights into the dynamic magnetic properties of the systems studied and highlight promising opportunities for …
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Magnetisierungsumkehr und -dynamik in Exchange-Bias-Systemen
… layer. The magneto-optical Kerr effect (MOKE) allows for detection of the longitudinal (parallel to an external field) as well as the transverse magnetization component (perpendicular to an external field). As shown in this thesis, both measurement can be performed within a single optical …
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Study of the Valence Tautomer Complex [Co(sq)(cat)(3-tpp)2] for Applications in Molecular Spintronics
… and a magneto-optic Kerr effect apparatus (MOKE). Additional experimental methods used to characterize the VT thin films include X-ray Absorption Spectroscopy (XAS), UV-visible Spectrometry (UV-Vis) and Differential Scanning Calorimetry. Experimental results obtained from these techniques …
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Spin transport in few-layer graphene
… fields. A magneto-optic Kerr effect microscopy (MOKE) study of the electrodes on NdGaO3 (100) and SrTiO3 (110), performed at room temperature and low temperature, showed that the electrodes have easy axes across their lengths, and sharp, well-defined switching, as desired for investigating spin …
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An Investigation of the Structure, Pinning and Magnetoresistance of Domain Walls in Ni81Fe19 Planar Nanowires
… interface. Magneto-optical Kerr effect (MOKE) magnetometry, differential phase contrast TEM imaging, micromagnetic simulations and anisotropic magnetoresistance measurements (AMR) have been used to make a detailed study of the thickness dependence of the magnetic behaviour of both thin …
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Magnetische Anisotropie und Spintransport in magnetoelektronischen Schichtsystemen und Nanostrukturen
… the Fe(110) layer.A magnetooptical Kerr effect (MOKE) study of micropatterned exchange bias systems with perpendicular magnetic anisotropy introduced in chapter 5 shows that perpendicular anisotropy as well as exchange bias are influenced, but not destroyed by the patterning process. Structures …
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Thermal transport in two-dimensional materials and magnetic multilayers
… and linear magneto-optical Kerr effects (TR-QMOKE and TR-MOKE, respectively) on 10-nm-thick and sub-nm-thick Co layers, respectively. Then I use sub-nm-thick Co layers embedded in much thicker Pt layers to investigate non-equilibrium heat transport in Pt. The fast magnetization dynamics of the …
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Your place or mine? The love hotel as a post-domestic hyperreality
… design of the Erotisch Centrum in Amsterdam, by Moke Architecten. At this point, the reader would be fully-equipped for an analysis of the Love Hotel, a Japanese building typology of sex hotel; and the Fun Palace, a design by Cedric Price, which explores some of its ideas in a less overtly-sexual …
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