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Showing 1 to 15 of 15 for “"XMCD"”.
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XANES und MEXAFS an magnetischen Übergangsmetalloxiden : Entwicklung eines digitalen Lock-In-XMCD-Experiments mit Phasenschieber
… Quantum Interference Device) Magnetometrie und XMCD-(X-ray Magnetic Circular Dich-roism) Messungen an den jeweiligen Absorptionskanten (XANES: X-ray Absorption Near Edge Structure) sowie im kantenfernen Bereich (MEXAFS: Magnetic Extended X-ray Ab-sorption Fine Structure) im Hinblick auf die …
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Diluted Magnetic Semiconductor Cobalt and Europium Implanted ZnO Thin Film
… clusters. The X-ray magnetic circular dichroism (XMCD) shows that the strong spin polarization of localized Eu atoms observed near surface of the Zn1-xEuxO thin films. The XMCD results also suggest Eu implanting to ZnO:Co system has suppressed Co metallic clustering. X-ray absorption fine …
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Half-metallic CrO_2 thin films for spintronic applications
… specific X-ray magnetic circular dichroism (XMCD) techniques were employed to investigate the effect of this substrate-induced strain on the magnetic properties of the films. Magnetic tunnel junctions (MTJ) were fabricated with CrO_2 , Cr_2 O_3 [natural oxide of Cr] as the thin insulating …
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Μελέτη της σχέσης δομής-μαγνητισμού σε λεπτά υμένια με ακτινοβολία σύγχροτρον και με συμβατικές πειραματικές τεχνικές
… ακτίνων Χ (x-ray magnetic circular dichroism – XMCD) άμορφα και κρυσταλλικά υμένια με παρόμοια σύνθεση. Αφενός, για πρώτη φορά μετρήθηκε η επαγόμενη μαγνητική ροπή στο ζιρκόνιο και το ύττριο σε άμορφα και κρυσταλλικά μαγνητικά υμένια και διαχωρίστηκαν οι μαγνητικές ροπές σπιν και τροχιάς. …
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Kolloidale Nanosysteme aus magnetischen und metallischen Materialien : Synthese und Charakterisierung
… und Röntgenzirkulardichroismus (XMCD) dafür eingesetzt wurden. Weil magnetische Messungen alleine nur indirekte Schlüsse über die untersuchten Systeme erlauben, wurde dabei besonderer Wert auf die möglichst genaue strukturelle Charakterisierung der Proben mittels moderner …
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Spin transport in few-layer graphene
… with X-ray magnetic circular dichroism contrast (XMCD-PEEM). For the electrodes on NdGaO3 (001), intermediate magnetic fields yielded domains with opposing magnetisations that formed along the length of each electrode, and domain propagation was likely pinned due to defects introduced by …
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Magnetoelectric Properties of Epitaxial Spinel Oxide Thin Films
… (XAS) and X-ray magnetic circular dichroism (XMCD) are presented, followed by the magnetic properties as measured by superconducting quantum interference device (SQUID) and magnetic force microscopy (MFM). In Chapter 5, the dielectric properties of FVO films are investigated by measuring the …
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Anisotropía magnética perpendicular en láminas delgadas amorfas y multicapas de ND-CO
… por medio de dicroísmo magnético circular (XMCD) y la posible existencia de orden local en torno a cada uno de ambos especímenes, así como su alteración con la temperatura, fue estudiado mediante EXAFS (estructura fina por absorción de rayos-X extendida). A diferencia de lo que sucede en los …
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Propiedades magnéticas de nanoestructuras fabricadas sobre áreas grandes mediante procesos de autoorganización y litografía por haz de electrones
… alterno (AGM) y dicroísmo magnético circular (XMCD). La litografía mediante copolímeros en bloque ha llevado a la formación de redes de nanopartículas metálicas ordenadas a primeros vecinos, así como redes de micelas o agujeros ordenadas que han servido como base de crecimiento para láminas de …
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Orbital Polarization in Relativistic Density Functional Theory
… experiments. In Chapter 6, to understand recent XMCD data for Co impurities in gold, the electronic structure of Co impurities inside gold has been calculated in the framework of local spin density approximation. The orbital and spin magnetic moment have been evaluated. In agreement with …
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Investigation of spin-caloric and spin-orbit torque materials by vectorial spin Seebeck measurements and an advanced x-ray magnetic reflectivity analysis
… by standard x-ray magnetic circular dichroism (XMCD) measurements. However, the in-depth analysis of the structural and magnetic depth profiles of the complexer half-Heusler bilayers turns out to be a challenge since there is no standard procedure to analyze XRMR asymmetry ratios. Another …
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Magnetic structures and proximity effects in rare-earth / transition metal ferromagnetic and superconductor systems
The antiferromagnetic coupling between a rare-earth (RE) and a tran- sition metal (TM) ferromagnet can be exploited to engineer normal state and superconducting functional devices. RE/TM ferromagnetic multi- layers were previously used as spin-mixers to generate spin-triplet su- percurrents. This …
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Sustainable Heusler and Antiferromagnetic Thin Films for High Density Data Storage
We are reaching capacity limits in data storage devices, due to restrictions on further miniaturization. There are also sustainability concerns regarding long-term data storage solutions, specifically associated with the use of critical raw elements. The use of novel materials must be investigated …
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Fabrication and Characterization of Three-Dimensional Magnetic Nanostructures
Today, two-dimensional nanoscale magnetic systems are well understood, being used in applications from spintronic circuits to automotive sensing. Despite the great progress achieved in the field during the last decades, the development of three-dimensional devices is still hindered by phenomenal …
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Optically induced ferro- and antiferromagnetic dynamics in the rare-earth metal dysprosium
Approaching physical limits in speed and size of today's magnetic storage and processing technologies demands new concepts for controlling magnetization and moves researches on optically induced magnetic dynamics. Studies on photoinduced magnetization dynamics and their underlying mechanisms have …