Dokumente Fakultät für Physik (inkl. GAUSS) nach Gutachter "Krebs, Hans-Ulrich Prof. Dr."
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Amorphe weichmagnetische CoFeNiSiB-Detektionsschichten in Spinventilen
(2003-04-17)Co-based amorphous magnetic films as detection layer in magnetoresistive systems are an attractive alternative instead of crystalline Ni81Fe19, as they are very soft magnetic, ... -
Aufbau einer Pulslaserdepositions-(PLD)-anlage und Untersuchungen zur PLD in den MAX-Phasen-Systemen Ti-Si-C, Cr-Al-C und Ti-Al-N
(2009-06-22)Ternary carbides and nitrides of certain chemical compositions -so called MAX phases- are a new and interesting class of functional ceramics. These compounds are refractory and heat resistant ... -
Beeinflussung des Wachstums von Metall auf Polymer durch die gepulste Laserdeposition
(2014-03-24)Nowadays, fabrication of embedded metal particles in dielectric matrices plays an important role for technical devices, e.g. data storage, sensors or enhancement of efficiency of solar cells. In this work, metal nanoparticles ... -
Charakterisierung und Modifizierung glatter laserdeponierter Poly(methyl methacrylat)-Schichten
(2010-04-06)Even though poly(methyl methacrylate) (PMMA) belongs to the weak absorbing materials at a wavelength of 248 nm, it is possible for the first time to deposit very smooth PMMA films with the ... -
Critical thicknesses in Nb-H thin films: coherent and incoherent phase transitions, change of precipitation and growth modes and ultrahigh mechanical stress
(2016-08-03)For nanoscale systems such as Me-H thin films, changes of physical properties have been suggested to appear below certain critical sizes. The probable existence of these critical sizes and the related changes of thermodynamical ... -
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 ... -
Glättungsmechanismen beim Ionenbeschuss rauer amorpher Oberflächen
(2008-03-18)Investigation of surface structures constitutes a broad field of contemporary research. Particularly due to proceeding miniaturization of electronic devices controlling the formation and evolution of surfaces and ... -
Hydrogen absorption property of nanocrystalline-magnesium films
(2016-11-07)The purpose of this study is to investigate hydrogen absorption properties of grain boundary rich pure magnesium film. X-ray diffraction (XRD) measurements has been carried out to estimate microstructures, texture, lattice ... -
Ionenstrahlunterstütztes Wachstum von Zinn-dotierten Indiumoxid-Filmen
(2004-05-24)In this work the optical, electrical and microstructural properties of tin-doped indium oxide (ITO) thin films deposited by ion beam assisted deposition (IBAD) were investigated. One aim ... -
Laser nitriding of metals:Influences of the ambient pressure and the pulse duration
(2002-03-01)Laser nitriding of metals such as iron, stainless steel, aluminum or titanium is an interesting phenomenon both in physics and industry. On a time scale of hundreds nanoseconds, high intensity ... -
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 ... -
Mechanische Spannungen und Mikrostruktur dünner TiNi- und Ti50Ni50-xCux-Formgedächtnisschichten
(2004-05-05)This thesis describes the fabrication process of TiNi and Ti50Ni50-xCux shape memory thin films by means of cocondensation via electron beam evaporation in UHV and their characterisation. During film growth and martensitic ... -
Mechanische Spektroskopie an metallischen Gläsern in reduzierter Dimensionalität
(2009-12-14)In glasses a broad spectra of different relaxation times is observed, but the underlying physical mechanisms are still a matter of investigation. The reason for the complex dynamics is mainly linked to heterogeneities ... -
Mechanische Spektroskopie an PMMA-Systemen: Nichtlineares Verhalten und UV-aktive Blockcopolymere
(2017-03-16)This thesis focuses on two different topics. Firstly the occurence of nonlinear higher harmonic contributions in the mechanical response of polymethylmethacrylate (PMMA) is investigated with dynamic mechanical analysis. ... -
Minimizing thermal conductivity in laser deposited multilayers
(2017-01-26)Heat, light and electricity are three foundation pillars not only of physics, but also of our daily lives. Therefore, these have been studied by scientists for centuries and an always better understanding of the underlying ... -
Multilagenbasierte Transmissionsoptiken für die Röntgenmikroskopie
(2012-08-23)Microscopy in the x-ray regime (0,001 – 10 nm wavelength) is a well-established method filling the gap between light and electron microscopy. Focusing of x-rays using transmission optics like zone plates, spatial resolutions ... -
Multilagenzonenplatten für die Mikroskopie mit harter Röntgenstrahlung
(2016-08-02)X-ray microscopy is due to the small wavelength and high penetration depth an auspicious technique for improved investigations of materials on nm-scale. For this, multilayer zone plates (MZP) with well-defined and smooth ... -
Nanoscale Waveguiding Studied by Lensless Coherent Diffractive Imaging using EUV High-Harmonic Generation Source
(2017-07-24)The challenge of nanometric imaging drives intense efforts in applied sciences and fundamental research. Following the physical law of diffraction, the utilization of extreme ultraviolet (EUV) or X-ray radiation for imaging ... -
Neuaufbau eines Pelletron-Beschleunigers und Untersuchungen zum Laserhydrieren von Silizium
(2003-03-17)Within the context of this thesis, a pelletron accelerator laboratory NEC 9SDH-2 was moved from the Max-Planck-Institut für Kernphysik Heidelberg to the II. Physikalisches Institut der ... -
Next-Generation Perturbed Angular Correlation Spectroscopy
(2014-06-12)Time differential perturbed angular correlation (TDPAC) spectroscopy is a nuclear solid-state physics method with unique advantages: Due to the penetrating power of gamma radiation used as information carrier, it allows ...