Dokumente Fakultät für Physik (inkl. GAUSS) nach Gutachter "Münzenberg, Markus Prof. Dr."
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3D STED Microscopy with Pulsed and Continuous Wave Lasers
(2008-04-16)STED microscopy improves the resolution of fluorescence microscope by effectively quenching the population of the excited state in the outer regions of the focus. The resolution capability in STED microscopy has already ... -
Bestimmung von Platzbesetzung und Bindungsenergien mittels Atomsondentomographie
(2010-07-22)The site occupation of ternary elements in an intermetallic phase is an important area in materials science. Up to now X-Ray based methods and a TEM based method called Atom Location by ... -
Current-Induced Excitations in Ferromagnetic Single Layer and Trilayer Nanodevices
(2007-06-27)The magnetization of a ferromagnetic nanostructure can be manipulated by a spin-polarized electrical current. Thus the switching mechanisms in Co/Cu/Co trilayers as well as in Co single ... -
Development and characterization of an electron gun for ultrafast electron microscopy
(2015-12-21)Ultrafast electron microscopy is an emerging field of research offering the potential to investigate structural processes on a femtosecond time-scale with nanometer resolution. In order to further advance ultrafast electron ... -
Electrical characterization of conductive ion tracks in tetrahedral amorphous carbon with copper impurities
(2014-01-10)The irradiation of tetrahedral amorphous carbon (ta-C) with swift heavy ions leads to the formation of conductive microscopic ion tracks with diameters of about 10 nm. This phenomena depends on the sp² to sp³ hybridization-ratio ... -
Entwicklung eines quantitativen Verfahrens zur Streufeld- und Magnetisierungsbestimmung magnetischer Strukturen
(2007-07-31)This work deals with the full quantitative local reconstruction of magnetization distributions from measurements of the normal component of the magnetic stray field of micro- and nanostructured ... -
High-Resolution Fluorescence Microscopy with Photoswitchable Fluorescent Proteins
(2009-02-12)The diffraction limit in far-field fluorescence microscopy can be overcome by photoswitching the marker molecules between a fluorescent and a non-fluorescent state. Photoswitching enables ... -
Ion-beam induced changes of magnetic and structural properties in thin Fe films
(2004-02-17)Magnetic in-plane anisotropy of ferromagnetic thin films is of great interest for the development of magnetic data storage devices. In recent years, several methods for the preparation of ... -
Korngrenzsegregation in Silber-Nickel und Kupfer-Wismut Legierungen
(2005-09-30)The objective of this study is the characterization of the grain boundary segregation in Ag-Ni and Cu-Bi alloys by means of tomographic atom probe (TAP) and other high resolution characterizing ... -
Korrelationen zwischen struktureller Ordnung und elektrischen Transporteigenschaften in CoFeB|MgO|CoFeB Tunnelmagnetowiderstandselementen
(2010-10-19)Magnetic tunnel junctions with amorphous ferromagnetic CoFeB electrodes and a crystalline MgO Barrier show a very high tunnel magnetoresistance (TMR). In epitaxial systems of Fe/MgO/Fe(001) ... -
Künstliche und selbstorganisierte Nanokomposite basierend auf oxidischen Verbindungen
(2011-10-25)Due to the large amount of phase and grain boundaries as well as the small length scales, highly efficient transport phenomena and coupling effects may occur in nano composite materials ... -
Laserinduzierte Änderungen der elektronischen Transporteigenschaften von Manganaten
(2017-07-31)This thesis investigates the influence of local excitations by ultra-short laser pulses in strongly correlated manganites. It focuses on the nonlinear transport properties which are connected to the correlations between ... -
Lichtinduzierte magnetische Defekte in ultradünnen Filmen
(2018-02-09)Topological defects such as domain walls, vortices or skyrmions in magnetic layers, exhibit promising properties which make them especially interesting for future applications in information technology. This work examines ... -
Magnetization and elastic dynamics in nanostructured metamaterials
(2016-03-24)In this work, magnetization and elastic dynamics in nano-structured artificial materials have been investigated in an all-optical, time-resolved, pump-probe experimental setup. Rich dynamics are brought about by means ... -
Molekulardynamische Untersuchungen zur Binnendynamik kollabierender Blasen
(2009-06-23)This work deals with the numerical simulation of cavitation- and sonoluminescence-bubbles, as well as laser-induced bubbles. The interior of the bubble is simulated by molecular ... -
Numerische Untersuchungen zum optischen Durchbruch von Femtosekunden-Laserpulsen in Wasser
(2010-11-05)When laser light of high intensity is focused into water, a plasma is formed in the area of the focus. This process is called optical breakdown and is numerically investigated for femtosecond ... -
Particle - Tracking - Velocimetry - Messungen an kollabierenden Kavitationsblasen
(2008-12-01)The flowfields around cavitation bubbles collapsing near obstacles are investigated in this work. For this purpose, photographs of the laser-induced bubbles are taken and the method of ... -
Photo-magnonics in two-dimensional antidot lattices
(2013-01-11)The essential subject of the present (cumulative) thesis is the all-optical generation and detection as well as the systematic manipulation of magnetic excitations, so-called spin waves or magnons. In particular, the ... -
Physics of laser heated ferromagnets: Ultrafast demagnetization and magneto-Seebeck effect
(2012-07-16)Including the spin degree of freedom into electronic circuits e.g. as non-volatile memory devices, requires the exact knowledge of the speed with which writing information is possible. All-optical pump-probe experiments ... -
Spin injection in MnGa/ GaN heterostructures
(2016-01-12)Due to the perfect epitaxial match of ferromagnetic MnGa on GaN and spin transport properties of GaN (long spin life time), the hybride MnGa/GaN is a promising material for future spintronic devices to examine. The ...