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2023-08-17: GRATULATION: MSc. Nanoeng. Inci Nur Sahin
Die Abbildung zeigt die chemische Zusammensetzung eines typischen Partikels. | Wir freuen uns mit Inci über den Abschluss Ihrer Masterarbeit im Studiengang Nanoengineering.
Ihre Arbeit und ihr Abschlusskolloquium wurden mit den jeweils bestmöglichen Noten bewertet.
Ihre Forschung zu "Optimierter Hyperthermie Ansatz mittels Fe3O4/SiO2/Ni Multischalen Nanoellipsoiden"
demonstriert eine neues Konzept zur biomedizinischen Theranostik mit synthetischen Antiferromagneten,
die aus Magnetit Halbschalen in einer Siliziumdioxid Hülle bestehen, naßchemisch herstellbar und hoch-skalierbar sind,
sowie ohne magnetische Streufelder in biomedizinischen Anwendungen verwendet werden könnten.
Die Arbeit ist hier zu finden.
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2023-08-12: Pinned magnetic moments in the collinear antiferromagnet PdMn
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Pinned magnetic moments in the collinear antiferromagnet PdMn
In a joint research work within the CRC/TRR270 "Hysteresis design of magnetic materials for efficient energy conversion" Nicolas Josten (PhD candidate) in project A04 could show that annealing the collinear antiferromagnet PdMn with excess Pd in a magnetic field produces strongly pinned magnetic moments in the annealing field direction. This behavior can be understood with the help of the magnetic-field-biased diffusion model. Here, the magnetic field creates an energy difference between the two possible occupations of the antiferromagnetic Mn-sublattices by the Pd-excess atoms. This, mediated by diffusion, leads to an imbalance in the amount of the Pd-excess atoms in these sublattices and, subsequently, to an imbalance in the total magnetization of the sublattices. For Details see: Annealing time, temperature, and field dependence of pinned magnetic moments in the collinear antiferromagnet PdMn
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2023-08-09: Helical magnetic structure of epitaxial films of nano-laminated Mn2GaC MAX phase
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In a multinational collaboration we could identify a complex magnetic arrangement of Mn magnetic moments, that is a helical magnetic structure consisting of the ferromagnetically coupled Mn-C-Mn slabs that are twisted across the Ga layer by 167.2 deg with respect to the next Mn-C-Mn slab. As a result, the magnetic structure presents a spiral propagating along the out-of-plane direction (hexagonal c axis) with a pitch of around 14 lattice constants. For Details see: Annealing time, temperature, and field dependence of pinned magnetic moments in the collinear antiferromagnet PdMn
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2023-08-01: Bachelor Thesis: Magnetic Resonance Spectroscopy of (Fe,Mn,Ni)PS3 van der Waals single crystals
Wir begrüßen Moritz Küster in unserem Team. Er forscht seit Juli im Rahmen seine Bachelorarbeit am Verständnis der magnetischen Wechselwirkungen in quasi-2D van der Waals Materialien. Mittels Elektronenspinresonanz als Funktion von Temperatur und Winkel versucht er die intrinsischen magnetischen Phasenübergänge zu identifizieren. Die ersten überraschenden Ergebnisse liegen vor. |
2023-09-07: WIR GRATULIEREN !
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Nicolas Josten ist am 22.07.2023 kirchlich getraut worden.
Wir freuen uns mit Ihm und seiner Frau und wünschen beiden alles Gute !
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2023-07-18: Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh
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In a trilateral French-Spanish-German collaboration we investigated the ablation properties of FeRh films. We found that the initial FeRh film displayed a reversible antiferromagnet-ferromagnet phase transition and the laser-ablated structures exhibited irreversible changes in their magnetic properties. Fluence-resolved measurements clearly demonstrate that the ablation threshold coincides with the threshold of the antiferromagnet-to-ferromagnet phase transition. For details see: Femtosecond Laser Ablation-Induced Magnetic Phase Transformations in FeRh Thin Films .
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2023-07-18: Easy up-scalable synthesis for ferrite nanoparticles
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2023-08-18: Impressionen der erfolgreichen Begehung zur 2. Förderperiode des SFB/TRR270
 | Hier geht es zur Website. |
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2023-06-29: Ni-Mn-Sn Heusler alloys manufactured by e-beam and laser powder bed fusion
| In a recent joint publication of the CRC/TRR270 we published a comparative study of additive manufacture Ni-Mn-Sn Heusler alloys.
Using an uncommon PBF-EB/M spot melting strategy, for the first time, crack-free Ni-Mn-Sn bulk material were produced and the chemical, microstructural, and magnetic properties were analyzed. Results on the magnetocaloric effect of the consolidated samples are reported. For details see S.-K. Rittinghaus et al. , Additive Manufacturing Letters 7 (2023) 100159 . |
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2023-06-16: Good Bye Manolis!
After his 5-months ERASMUS-funded internship Emmanouil Kasotakis left us after setting up and testing a now fully functioning sputter deposition system which he commissioned together with Moritz Vanselow and Dr. Anna Semisalova.
We wish him a fruitful and successful career wherever his interest my lead him.
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2023-06-13: Towards THz Physics with GHz excitation (inertia in spin dynamics)
The dynamics of magnetic moments consists of a precession around the magnetic field direction and a
relaxation towards the field to minimize the energy. While the magnetic moment and the angular momentum are conventionally assumed to be parallel to each other, at ultrafast time scales their directions become separated due to inertial effects. The inertial dynamics gives rise to additional high-frequency modes in the excitation spectrum of magnetic materials. Here, our international collaboration reviews the recent theoretical and experimental advances in this emerging topic and discuss the open challenges and opportunities in
the detection and the potential applications of inertial spin dynamics.
For further details see https://doi.org/10.1016/j.jmmm.2023.170830. |
