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Modern Magnetic Systems Article Unique high-temperature performance of highly condsensed MnBi permanent magnets Chen, Y., Gregori, G., Leineweber, A., Qu, F., Chen, C., Tietze, T., Kronmüller, H., Schütz, G., Goering, E. Scripta Materialia, 107:131-135, Pergamon, Tarrytown, NY, 2015 (Published) DOI BibTeX
Modern Magnetic Systems Master Thesis Voltage-induced magnetic manipulation of a microstructured iron gold multilayer system Sittig, R. Universität Stuttgart, Stuttgart, 2015 BibTeX
Modern Magnetic Systems Article XMCD studies of thin Co films on BaTiO3 Welke, M., Gräfe, J., Govind, R. K., Babu, V. H., Trautmann, M., Schindler, K., Denecke, R. {Journal of Physics: Condensed Matter}, 27(32), IOP Publishing, Bristol, UK, 2015
Different layer thicknesses of cobalt ranging from 2.6 Å (1.5 ML) up to 55 Å (30.5 ML) deposited on ferroelectric BaTiO3 have been studied regarding their magnetic behavior. The layers have been characterized using XMCD spectroscopy at remanent magnetization. After careful data analysis the magnetic moments of the cobalt could be determined using the sum rule formalism. There is a sudden and abrupt onset in magnetism starting at thicknesses of 9 Å (5 ML) of cobalt for measurements at 120 K and of 10 Å (5.5 ML) if measured at room temperature. Initial island growth and subsequent coalescence of Co on BaTiO3 is suggested to explain the sudden onset. In that context, no magnetically dead layers are observed.
DOI BibTeX
Modern Magnetic Systems Article A fluorene based covalent triazine framework with high CO2 and H2 capture and storage capacities Hug, S., Mesch, M. B., Oh, H., Popp, N., Hirscher, M., Senker, J., Lotsch, B. V. {Journal of Materials Chemistry A}, 2(16):5928-5936, Royal Society of Chemistry, Cambridge, UK, 2014 DOI BibTeX
Modern Magnetic Systems Article Ab-initio calculations and atomistic calculations on the magnetoelectric effects in metallic nanostructures Fähnle, M., Subkow, S. {Physica Status Solidi C}, 11(2):185-191, Wiley-VCH, Weinheim, 2014 DOI BibTeX
Modern Magnetic Systems Article Application of magneto-optical Kerr effect to first-order reversal curve measurements Gräfe, J., Schmidt, M., Audehm, P., Schütz, G., Goering, E. {Review of Scientific Instruments}, 85, American Institute of Physics, Woodbury, N.Y. [etc.], 2014
First-order reversal curves (FORC) are a powerful method for magnetic sample characterization, separating all magnetic states of an investigated system according to their coercivity and internal magnetic interactions. A major drawback of using measurement techniques like VSM or SQUID, typically applied for FORC acquisition, is the long measurement time, limiting the resolution and the number of measurements due to time constraints. Faster techniques like MOKE result in problems regarding measurement stability over the curse of the acquisition of many minor loops, due to drift and non-absolute magnetization values. Here, we present an approach using a specialized field shape providing two anchor points for each minor loop for applying the magneto-optical Kerr effect (MOKE) technique to FORC measurements. This results in a high field resolution while keeping the total acquisition time to only a few minutes. MOKE FORC measurements are exemplarily applied to a simple permalloy film, an exchange-bias system, and a Gd/Fe multilayer system with perpendicular magnetic anisotropy, showcasing the versatility of the method.
DOI BibTeX
Modern Magnetic Systems Article Detecting magnetic flux distributions in superconductors with polarized x-rays Stahl, C., Audehm, P., Gräfe, J., Ruoß, S., Weigand, M., Schmidt, M., Treiber, S., Bechtel, M., Goering, E., Schütz, G., Albrecht, J. {Physical Review B}, 90(10), American Physical Society, Woodbury, NY, 2014
The magnetic flux distribution arising from a high-Tc superconductor is detected and visualized using polarized x rays. Therefore, we introduce a sensor layer, namely, an amorphous, soft-magnetic Co40Fe40B20 cover layer, providing a large x-ray magnetic circular dichroism (XMCD). Temperature-dependent XMCD spectroscopy on the magnetic layer has been performed. Exploiting the temperature dependence of the critical current density of the superconductor we find a quantitative correlation between the XMCD signal and the in-plane stray field of the superconductor. Magneto-optical Kerr effect experiments on the sensor layer can simulate the stray field of the superconductor and hence verify the correlation. We show that the XMCD contrast in the sensor layer corresponds to the in-plane magnetic flux distribution of the superconductor and can hence be used to image magnetic structures in superconductors.
DOI BibTeX
Modern Magnetic Systems Article Direct observation of internal vortex domain-wall dynamics Stein, F., Bocklage, L., Weigand, M., Meier, G. {Physical Review B}, 89(2), American Physical Society, Woodbury, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Domain wall pinning in ultra-narrow electromigrated break junctions Reeve, R. M., Loescher, A., Mawass, M., Hoffmann-Vogel, R., Kläui, M. {Journal of Physics: Condensed Matter}, 26(47), IOP Publishing, Bristol, 2014 DOI BibTeX
Modern Magnetic Systems Article Domain wall transformations and hopping in La0.7Sr0.3MnO3 nanostructures imaged with high resolution x-ray magnetic microscopy Finizio, S., Foerster, M., Krüger, B., Vaz, C. A. F., Miyawaki, T., Mawass, M. A., Pena, L., Méchin, L., Hühn, S., Moshnyaga, V., Büttner, F., Bisig, A., Le Guyader, L., El Moussaoui, S., Valencia, S., Kronast, F., Eisebitt, S., Kläui, M. {Journal of Physics: Condensed Matter}, 26(45), IOP Publishing, Bristol, 2014 DOI BibTeX
Modern Magnetic Systems Article Efficient focusing of 8 keV X-rays with multilayer Fresnel zone plates fabricated by atomic layer deposition and focused ion beam milling. Erratum Mayer, M., Keskinbora, K., Grévent, C., Szeghalmi, A., Knez, M., Weigand, M., Snigirev, A., Snigireva, I., Schütz, G. {Journal of Synchrotron Radiation}, 640:640-640, Published for the International Union of Crystallography by Munksgaard, Copenhagen, Denmark, 2014 DOI BibTeX
Modern Magnetic Systems Article Efflorescence upon humidification? X-ray microspectroscopic in situ observation of changes in aerosol microstructure and phase state upon hydration Pöhlker, C., Saturno, J., Krüger, M. L., Förster, J. D., Weigand, M., Wiedemann, K. T., Bechtel, M., Artaxo, P., Andreae, M. O. {Geophysical Research Letters}, 41(10):3681-3689, American Geophysical Union, Washington, D.C., 2014 DOI BibTeX
Modern Magnetic Systems Article Element specific monolayer depth profiling Macke, S., Radi, A., Hamann-Borrero, J. E., Verna, A., Bluschke, M., Brück, S., Goering, E., Sutarto, R., He, F., Cristiani, G., Wu, M., Benckiser, E., Habermeier, H., Logvenov, G., Gauquelin, N., Botton, G. A., Kajdos, A. P., Stemmer, S., Sawatzky, G. A., Haverkort, M. W., et al. {Advanced Materials}, 26(38):6554-6559, Wiley VCH, Weinheim, 2014 DOI BibTeX
Modern Magnetic Systems Article Element-specific depth profile of magnetism and stoichiometry at the La0.67Sr0.33MnO3/BiFeO3 interface Bertinshaw, J., Brück, S., Lott, D., Fritzsche, H., Khaydukov, Y., Soltwedel, O., Keller, T., Goering, E., Audehm, P., Cortie, D. L., Hutchison, W. D., Ramasse, Q. M., Arredondo, M., Maran, R., Nagarajan, V., Klose, F., Ulrich, C. {Physical Review B}, 90(4), American Physical Society, Woodbury, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Experimental assessment of Physical upper limit for hydrogen storage capacity at 20 K in densified MIL-101 monoliths Oh, H., Lupu, D., Blanita, G., Hirscher, M. {RSC Advances}, 4(6):2648-2651, Royal Society of Chemistry, Cambridge, UK, 2014 DOI BibTeX
Modern Magnetic Systems Article Highly effective hydrogen isotope separation in nanoporous metal-organic framworks with open metal sites: Direct measurement and theoretical analysis Oh, H., Savchenko, I., Mavrandonakis, A., Heine, T., Hirscher, M. {ACS Nano}, 8(1):761-770, American Chemical Society, Washington, DC, 2014 DOI BibTeX
Modern Magnetic Systems Conference Paper Increasing the sensor performance using Au modified high temperature superconducting YBa2Cu3O7-delta thin films Katzer, C., Stahl, C., Michalowski, P., Treiber, S., Westernhausen, M., Schmidl, F., Seidel, P., Schütz, G., Albrecht, J. In {Journal of Physics: Condensed Matter}, 507, IOP Pub., Genova, Italy, 2014 DOI BibTeX
Modern Magnetic Systems Article Influence of magnetic fields on spin-mixing in transition metals Haag, M., Illg, C., Fähnle, M. {Physical Review B}, 90(13), American Physical Society, Woodbury, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Interplay of linker functionalization and hydrogen adsorption in the metal-organic framework MIL-101 Szilágyi, P. A., Weinrauch, I., Oh, H., Hirscher, M., Juan-Alcaniz, J., Serra-Crespo, P., de Respinis, M., Trzesniewski, B. J., Kapteijn, F., Geerlings, H., Gascon, J., Dam, B., Grzech, A., van de Krol, R. {The Journal of Physical Chemistry C}, 118(34):19572-19579, American Chemical Society, Washington DC, 2014 DOI BibTeX
Modern Magnetic Systems Article Investigation of cellular microstructure and enhanced coercivity in sputtered Sm2(CoCuFeZr)17 film Bhatt, R., Bhatt, P., Schütz, G. {Journal of Applied Physics}, 115(10), American Institute of Physics, New York, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Local modification of the magnetic vortex-core velocity by gallium implantation Langner, H. H., Vogel, A., Beyersdorff, B., Weigand, M., Frömter, R., Oepen, H. P., Meier, G. {Journal of Applied Physcis}, (10), American Institute of Physics, New York, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Low-amplitude magnetic vortex core reversal by non-linear interaction between azimuthal spin waves and the vortex gyromode Sproll, M., Noske, M., Bauer, H., Kammerer, M., Gangwar, A., Dieterle, G., Weigand, M., Stoll, H., Woltersdorf, G., Back, C. H., Schütz, G. {Applied Physics Letters}, 104(1), American Institute of Physics, Melville, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Magnetic field distribution and characteristic fields of the vortex lattice for a clean superconducting niobium sample in an external field applied along a three-fold axis Yaouanc, A., Maisuradze, A., Nakai, N., Machida, K., Khasanov, R., Amato, A., Biswas, P. K., Baines, C., Herlach, D., Henes, R., Keppler, P., Keller, H. {Physical Review B}, 89(18), American Physical Society, Woodbury, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Magnetic reflectometry of heterostructures (Topical Review) Macke, S., Goering, E. {Journal of Physics: Condensed Matter}, 26(36), IOP Publishing, Bristol, 2014 DOI BibTeX
Modern Magnetic Systems Ph.D. Thesis Magnetism of unconventional nanoscaled materials: An X-ray circular dichroism and muon spin rotation study Tietze, T. Universität Stuttgart, Stuttgart, 2014 URL BibTeX
Modern Magnetic Systems Article Multilayer Fresnel zone plates for high energy radiation resolve 21 nm features at 1.2 keV Keskinbora, K., Robisch, A., Mayer, M., Sanli, U., Grévent, C., Wolter, C., Weigand, M., Szeghalmi, A., Knez, M., Salditt, T., Schütz, G. {Optics Express}, 22(15):18440-18453, Optical Society of America, Washington, DC, 2014 DOI BibTeX
Modern Magnetic Systems Ph.D. Thesis Nanoporous Materials for Hydrogen Storage and H2/D2 Isotope Separation Oh, H. Universität Stuttgart, Stuttgart, 2014 URL BibTeX
Modern Magnetic Systems Article Optimizing the fabrication of diffractive optical elements using a focused ion beam system Vijayakumar, A., Eigenthaler, U., Keskinbora, K., Sridharan, G. M., Pramitha, V., Hirscher, M., Spatz, J. P., Bhattacharya, S. {Proceedings of SPIE}, 9130, 2014 DOI BibTeX
Modern Magnetic Systems Ph.D. Thesis Realization of a new Magnetic Scanning X-ray Microscope and Investigation of Landau Structures under Pulsed Field Excitation Weigand, M. Universität Stuttgart, Stuttgart (und Cuvillier Verlag, Göttingen), 2014 BibTeX
Modern Magnetic Systems Article Role of electron-magnon scatterings in ultrafast demagnetization Haag, M., Illg, C., Fähnle, M. {Physical Review B}, 90(1), American Physical Society, Woodbury, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Role of the sample boundaries in the problem of dissipative magnetization dynamics Fähnle, M., Slavin, A., Hertel, R. {Journal of Magnetism and Magnetic Materials}, 360:126-130, Elsevier, Amsterdam, 2014 DOI BibTeX
Modern Magnetic Systems Ph.D. Thesis Schalten der Polarität magnetischer Vortexkerne durch eine Zwei-Frequenzen Anregung und mittels direkter Einkopplung eines Stroms Sproll, M. Universität Stuttgart, Stuttgart (und Cuvillier Verlag, Göttingen), Stuttgart, 2014 BibTeX
Modern Magnetic Systems Article Spatial degradation mapping and component-wise degradation tracking in polymer-fullerene blends Pedersen, E. B. B., Tromholt, T., Madsen, M. V., Böttiger, A. P. L., Weigand, M., Krebs, F. C., Andreasen, J. W. {Journal of Materials Chemistry C}, 2(26):5176-5182, Royal Society of Chemistry, Cambridge, UK, 2014 DOI BibTeX
Modern Magnetic Systems Article Stabilization of the dissipation-free current transport in inhomogeneous MgB2 thin films Treiber, S., Stahl, C., Schütz, G., Soltan, S., Albrecht, J. {Physica C}, 506:1-5, North-Holland, Amsterdam, 2014 DOI BibTeX
Modern Magnetic Systems Article Strengthening zones in the Co matrix of WC-Co cemented carbides Konyashin, I., Lachmann, F., Ries, B., Mazilkin, A. A., Straumal, B. B., Kübel, C., Llanes, L., Baretzky, B. {Scripta Materialia}, 83:17-20, Pergamon, Tarrytown, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Synchronous precessional motion of multiple domain walls in a ferromagnetic nanowire by perpendicular field pulses Kim, J., Mawass, M., Bisig, A., Krüger, B., Reeve, R. M., Schulz, T., Büttner, F., Yoon, J., You, C., Weigand, M., Stoll, H., Schütz, G., Swagten, H. J. M., Koopmans, B., Eisebitt, S., Kläui, M. {Nature Communications}, 5, Nature Publishing Group, London, 2014 DOI BibTeX
Modern Magnetic Systems Article The local magnetic properties of [MnIII6 CrIII]3+ and [FeIII6 CrIII]3+ single-molecule magnets deposited on surfaces studied by spin-polarized photoemission and XMCD with circularly polarized synchrotron radiation Heinzmann, U., Helmstedt, A., Dohmeier, N., Müller, N., Gryzia, A., Brechling, A., Hoeke, V., Krickemeyer, E., Glaser, T., Fonin, M., Bouvron, S., Leicht, P., Tietze, T., Goering, E., Kuepper, K. {Journal of Physics: Conference Series}, 488(13), IOP Publishing, Bristol, 2014 DOI BibTeX
Modern Magnetic Systems Article Thermal conductivity of mechanically joined semiconducting/metal nanomembrane superlattices Grimm, D., Wilson, R. B., Teshome, B., Gorantla, S., Rümmeli, M. H., Bublat, T., Zallo, E., Li, G., Cahill, D. G., Schmidt, O. G. {Nano Letters}, 14(5):2387-2393, American Chemical Society, Washington, DC, 2014 DOI BibTeX
Modern Magnetic Systems Article Tunable eigenmodes of coupled magnetic vortex oscillators Hänze, M., Adolff, C. F., Weigand, M., Meier, G. {Applied Physics Letters}, 104(18), American Institute of Physics, Melville, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Understanding the adsorption mechanism of noble gases Kr and Xe in CPO-27-Ni, CPO-27-Mg, and ZIF-8 Magdysyuk, O. V., Adams, F., Liermann, H., Spanopoulos, I., Trikalitis, P. N., Hirscher, M., Morris, R. E., Duncan, M. J., McCormick, L. J., Dinnebier, R. E. {Physical Chemistry Chemical Physics}, 16(43):23908-23914, Royal Society of Chemistry, Cambridge, England, 2014 DOI BibTeX
Modern Magnetic Systems Article Unidirectional sub-100-ps magnetic vortex core reversal Noske, M., Gangwar, A., Stoll, H., Kammerer, M., Sproll, M., Dieterle, G., Weigand, M., Fähnle, M., Woltersdorf, G., Back, C. H., Schütz, G. {Physical Review B}, 90(10), American Physical Society, Woodbury, NY, 2014 DOI BibTeX
Modern Magnetic Systems Article Using magnetic coupling in bilayers of superconducting YBCO and soft-magnetic CoFeB to map supercurrent flow Stahl, C., Walker, P., Treiber, S., Christiani, G., Schütz, G., Albrecht, J. {EPL}, 106(2), 2014 DOI BibTeX
Modern Magnetic Systems Article Vortex core reversal due to spin wave interference Bauer, H. G., Sproll, M., Back, C. H., Woltersdorf, G. {Physical Review Letters}, 112, American Physical Society, Woodbury, N.Y., 2014 DOI BibTeX
Modern Magnetic Systems Ph.D. Thesis Vortex-Kern-Korrelation in gekoppelten Systemen Jüllig, P. Universität Stuttgart, Stuttgart, 2014 URL BibTeX
Modern Magnetic Systems Article Magnetoelastic coupling in epitaxial cobalt ferrite/barium titanate heterostructures Gräfe, J., Welke, M., Bern, F., Ziese, M., Denecke, R. Journal of Magnetism and Magnetic Materials, 339:84-88, 2013
Ultra-thin cobalt ferrite films have been synthesised on ferroelectric barium titanate crystals. The cobalt ferrite films exhibit a magnetic response to strain induced by structural changes in the barium titanate substrate, suggesting a pathway to multiferroic coupling. These structural changes are achieved by heating through the phase transition temperatures of barium titanate. In addition the ferromagnetic signal of the substrate itself is taken into account, addressing the influence of impurities or defects in the substrate. The cobalt ferrite/barium titanate heterostructure is a suitable oxidic platform for future magnetoelectric applications with an established ferroelectric substrate and widely tuneable magnetic properties by changing the transition metal in the ferrite film.
DOI BibTeX
Modern Magnetic Systems Article A cryogenically flexible covalent organic framework for efficient hydrogen isotrope separation by quantum sieving Oh, H., Kalidindi, S. B., Um, Y., Bureekaew, S., Schmid, R., Fischer, R. A., Hirscher, M. {Angewandte Chemie International Edition in English}, 52(50):13219-13222, Wiley-VCH Verlag GmbH & Co. KGaA, D-69451 Weinheim, 2013 DOI BibTeX
Modern Magnetic Systems Ph.D. Thesis Ab-initio modeling of ultrafast demagnetization after laser irradiation in nickel, iron and cobalt Illg, C. Universität Stuttgart, Stuttgart, 2013 URL BibTeX
Modern Magnetic Systems Article Correlation between spin structure oscillations and domain wall velocities Bisig, A., Stärk, M., Mawass, M., Moutafis, C., Rhensius, J., Heidler, J., Büttner, F., Noske, M., Weigand, M., Eisebitt, S., Tyliszczak, T., Van Wayenberge, B., Stoll, H., Schütz, G., Kläui, M. {Nature Communications}, 4, Nature Publishing Group, London, 2013 DOI BibTeX
Modern Magnetic Systems Article Delayed magnetic vortex core reversal Kammerer, M., Sproll, M., Stoll, H., Noske, M., Weigand, M., Illg, C., Fähnle, M., Schütz, G. {Applied Physics Letters}, 102, American Institute of Physics, Melville, NY, 2013 DOI BibTeX
Modern Magnetic Systems Article Efficient focusing of 8 keV X-rays with multilayer Fresnel zone plates fabricated by atomic layer deposition and focused ion beam milling Mayer, M., Keskinbora, K., Grévent, C., Szeghalmi, A., Knez, M., Weigand, M., Snigirev, A., Snigereva, I., Schütz, G. {Journal of Synchrotron Radiation}, 20:433-440, Published for the International Union of Crystallography by Munksgaard, Copenhagen, Denmark, 2013 DOI BibTeX