Michael Leitner
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View article: A model for positron annihilation in multi-layer systems by solving the diffusion equation using different positron affinities
A model for positron annihilation in multi-layer systems by solving the diffusion equation using different positron affinities Open
We present a method for solving the positron diffusion equation in multi-layer systems. Our approach incorporates material-specific implantation profiles, diffusion parameters, and positron affinities. It utilizes a Markov chain approach t…
View article: Four Guiding Principles for Modeling Causal Domain Knowledge: A Case Study on Brainstorming Approaches for Urban Blight Analysis
Four Guiding Principles for Modeling Causal Domain Knowledge: A Case Study on Brainstorming Approaches for Urban Blight Analysis Open
Urban blight is a problem of high interest for planning and policy making. Researchers frequently propose theories about the relationships between urban blight indicators, focusing on relationships reflecting causality. In this paper, we i…
View article: Linked PDF of Table of Contents
Linked PDF of Table of Contents Open
View article: Magnetization reversal induced by antiphase domain boundaries in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Ni</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Mn</mml:mi><mml:mi>Z</mml:mi></mml:mrow></mml:math> Heusler compounds
Magnetization reversal induced by antiphase domain boundaries in Heusler compounds Open
The correlation of the microstructure and the magnetic properties of Ni2MnAl0.5Ga0.5 and Ni2MnAl Heusler alloys is studied in samples of distinct L21 order states by neutron powder dif…
View article: Fermi Surface Modeling of Light‐Rare‐Earth Hexaborides using Positron Annihilation Spectroscopy
Fermi Surface Modeling of Light‐Rare‐Earth Hexaborides using Positron Annihilation Spectroscopy Open
2D angular correlation of the positron annihilation radiation (2D‐ACAR) spectra are measured for along high‐symmetry directions and compared with first‐principles calculations based on density functional theory (DFT). This allows the model…
View article: Antiphase domain growth: Correlation functions and structure factors in the scaling regime
Antiphase domain growth: Correlation functions and structure factors in the scaling regime Open
We study the coarsening of three-dimensional antiphase domain structures via Monte Carlo simulations. Linear lattice dimensions of $N=1024$ enable us to reach a scaling regime covering about 2.5 orders of magnitude of linear scale. With sh…
View article: Momentum density spectroscopy of Pd: Comparison of 2D-ACAR and Compton scattering using a 1D-to-2D reconstruction method
Momentum density spectroscopy of Pd: Comparison of 2D-ACAR and Compton scattering using a 1D-to-2D reconstruction method Open
Two-dimensional angular correlation of annihilation radiation (2D-ACAR) and\nCompton scattering are both powerful techniques to investigate the bulk\nelectronic structure of crystalline solids through the momentum density of the\nelectrons…
View article: Atomic Order Along the Half‐ to Full‐Heusler Transition in Ni<sub>1+<i>x</i></sub>MnSb
Atomic Order Along the Half‐ to Full‐Heusler Transition in Ni<sub>1+<i>x</i></sub>MnSb Open
Structural voids are a defining feature of the half‐Heusler structure. Using temperature‐dependent neutron diffraction, complemented by room‐temperature X‐ray diffraction and high‐resolution neutron diffraction as well as calorimetry and m…
View article: Fermi-Surface Modeling of Light-Rare-Earth Hexaborides with 2D-ACAR Spectroscopy
Fermi-Surface Modeling of Light-Rare-Earth Hexaborides with 2D-ACAR Spectroscopy Open
Two dimensional angular correlation of the positron annihilation radiation (2D-ACAR) spectra are measured for $\mathrm{LaB}_6$ along high symmetry directions and compared with first principle calculations based on density functional theory…
View article: Diffusive dynamics in an amorphous superionic conductor
Diffusive dynamics in an amorphous superionic conductor Open
The fast diffusion of alkali ions and resulting high ionic conductivity is a defining feature of alkali borate glasses. Here we report impedance spectroscopy and atomic-scale x-ray photon correlation spectroscopy measurements on rubidium b…
View article: Breakdown of Arrhenius law of temperature-dependent vacancy concentration in fcc lanthanum
Breakdown of Arrhenius law of temperature-dependent vacancy concentration in fcc lanthanum Open
We measured the temperature dependent equilibrium vacancy concentration using\nin-situ positron annihilation spectroscopy in order to determine the enthalpy\n$H_\\text{f}$ and entropy $S_\\text{f}$ of vacancy formation in elementary\nfcc-L…
View article: Impedance spectroscopy data for several rubidium borate glasses
Impedance spectroscopy data for several rubidium borate glasses Open
Results of Impedance Spectroscopy (IS) mesurements of different rubidium borate glasses with chemical formula x(Rb2O) (1-x)(B2O3). Mesurements for different temperatures.Full impedance spectra of four systems with varying Rb_2O content at …
View article: A modular 3D printed isothermal heat flow calorimeter for reaction calorimetry in continuous flow
A modular 3D printed isothermal heat flow calorimeter for reaction calorimetry in continuous flow Open
The presented continuous flow calorimeter enables process understanding of novel flow syntheses and the use of highly reactive compounds. Adaptation of the calorimeter is possible via 3D printing and due to its modular and expandable desig…
View article: Autocorrelation functions obtained by aXPCS for 30(Rb2O) 70(B2O3) glass, taken at different temperatures and beam fluxes.
Autocorrelation functions obtained by aXPCS for 30(Rb2O) 70(B2O3) glass, taken at different temperatures and beam fluxes. Open
Autocorrelation functions obtained by aXPCS for 30(Rb2O) 70(B2O3) glass, taken at different temperatures and beam fluxes.The autocorrelation functions as space-separated ASCII files, with the experimental temperature and beam intensity giv…
View article: Beam-induced atomic motion in alkali borate glasses
Beam-induced atomic motion in alkali borate glasses Open
Applying coherent X-rays by the method of atomic-scale X-ray Photon\nCorrelation Spectroscopy results in beam-induced dynamics in a number of oxide\nglasses. Here these studies are extended to rubidium and caesium borates with\nvarying alk…
View article: Phonon Lifetimes throughout the Brillouin Zone at Elevated Temperatures from Experiment and<i>Ab Initio</i>
Phonon Lifetimes throughout the Brillouin Zone at Elevated Temperatures from Experiment and<i>Ab Initio</i> Open
We obtain phonon lifetimes in aluminium by inelastic neutron scattering experiments, by ab initio molecular dynamics, and by perturbation theory. At elevated temperatures significant discrepancies are found between experiment and perturbat…
View article: Atomic diffusion studied by coherent X-ray scattering
Atomic diffusion studied by coherent X-ray scattering Open
View article: Polycrystalline Time-of-Flight Inelastic Neutron Scattering beyond the Density of States
Polycrystalline Time-of-Flight Inelastic Neutron Scattering beyond the Density of States Open
Conventionally, experimental phonon dispersions are determined by inelastic neutron scattering on triple-axis spectrometers or by inelastic X-ray scattering, in both cases requiring single crystalline samples. [...]
View article: Recent Advances in Novel Materials for Future Spintronics
Recent Advances in Novel Materials for Future Spintronics Open
As we all know, electrons carry both charge and spin. The processing of information in conventional electronic devices is based only on the charge of electrons. Spin electronics, or spintronics, uses the spin of electrons, as well as their…
View article: Crystallographic and Nanomechanical Analysis by Correlative In-situ AFM & SEM
Crystallographic and Nanomechanical Analysis by Correlative In-situ AFM & SEM Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the 'Save PDF' action button.
View article: Correlative In-Situ Analysis on the Nanoscale by combination of AFM and SEM
Correlative In-Situ Analysis on the Nanoscale by combination of AFM and SEM Open
An abstract is not available for this content so a preview has been provided. As you have access to this content, a full PDF is available via the 'Save PDF' action button.
View article: Ordering tendencies and electronic properties in quaternary Heusler derivatives
Ordering tendencies and electronic properties in quaternary Heusler derivatives Open
The phase stabilities and ordering tendencies in the quaternary full-Heusler alloys NiCoMnAl and NiCoMnGa have been investigated by in-situ neutron diffraction, calorimetry and magnetization measurements. NiCoMnGa was found to adopt the L2…
View article: Improved Understanding of Material Behavior using Correlative In-situ Techniques
Improved Understanding of Material Behavior using Correlative In-situ Techniques Open
View article: Correlative In-Situ AFM & SEM & EDX Analysis of Nanostructured Materials
Correlative In-Situ AFM & SEM & EDX Analysis of Nanostructured Materials Open
Journal Article Correlative In-Situ AFM & SEM & EDX Analysis of Nanostructured Materials Get access M Winhold, M Winhold GETec Microscopy GmbH, Vienna, Austria Search for other works by this author on: Oxford Academic Google Scholar M Leit…
View article: L12 ordering and δ′ precipitation in Al-Cu-Li
L12 ordering and δ′ precipitation in Al-Cu-Li Open
The precipitation mechanism of the δ ′ (Al 3 Li) phase in Al-Li alloys has been controversially discussed in recent decades, specifically with respect to a conjectured congruent ordering process. However, kinetics in the Al-Li system does …
View article: Electronic correlations in vanadium revealed by electron-positron annihilation measurements
Electronic correlations in vanadium revealed by electron-positron annihilation measurements Open
The electronic structure of vanadium measured by Angular Correlation of\nelectron-positron Annihilation Radiation (ACAR) is compared with the\npredictions of the combined Density Functional and Dynamical Mean-Field Theory\n(DMFT). Reconstr…
View article: Positron spectroscopy of point defects in the skyrmion-lattice compound MnSi
Positron spectroscopy of point defects in the skyrmion-lattice compound MnSi Open
Outstanding crystalline perfection is a key requirement for the formation of new forms of electronic order in a vast number of widely different materials. Whereas excellent sample quality represents a standard claim in the literature, ther…
View article: Erratum: Local electron-electron interaction strength in ferromagnetic nickel determined by spin-polarized positron annihilation
Erratum: Local electron-electron interaction strength in ferromagnetic nickel determined by spin-polarized positron annihilation Open
Scientific Reports 6: Article number: 20898; published online: 16 February 2016; updated: 13 April 2016 The original version of this Article contained a typographical error in the spelling of the author Josef Andreas Weber, which was incor…
View article: Local electron-electron interaction strength in ferromagnetic nickel determined by spin-polarized positron annihilation
Local electron-electron interaction strength in ferromagnetic nickel determined by spin-polarized positron annihilation Open
View article: Spin-Resolved Fermi Surface of the Localized Ferromagnetic Heusler Compound<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi>Cu</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mi>MnAl</mml:mi></mml:mrow></mml:math>Measured with Spin-Polarized Positron Annihilation
Spin-Resolved Fermi Surface of the Localized Ferromagnetic Heusler CompoundMeasured with Spin-Polarized Positron Annihilation Open
We determined the bulk electronic structure of the prototypical Heusler compound Cu(2)MnAl by measuring the angular correlation of annihilation radiation using spin-polarized positrons. To this end, a new algorithm for reconstructing 3D de…