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Pappas, C. (author), Leonov, A.O. (author), Bannenberg, L.J. (author), Fouquet, P (author), Wolf, T. (author), Weber, F (author)We present a comprehensive investigation of the evolution of helimagnetic correlations in Mn1−xFexSi with increasing doping. By combining polarized neutron scattering and high resolution neutron spin echo spectroscopy we investigate three samples with x = 0.09, 0.11, and 0.14, i.e., with compositions on both sides of the concentration x∗∼0.11...journal article 2021
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Martin, N. (author), Bannenberg, L.J. (author), Deutsch, M. (author), Pappas, C. (author), Chaboussant, G. (author), Cubitt, R. (author), Mirebeau, I. (author)We study the evolution of the low-temperature field-induced magnetic defects observed under an applied magnetic field in a series of frustrated amorphous ferromagnets (Fe<sub>1</sub><sub>-</sub><sub>x</sub>Mn<sub>x</sub>)<sub>75</sub>P<sub>16</sub>B<sub>3</sub>Al<sub>3</sub> (“a-Fe<sub>1</sub><sub>-</sub><sub>x</sub>Mn<sub>x</sub>”)....journal article 2021
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Wang, Xuehang (author), Bannenberg, L.J. (author)MXenes, two-dimensional transition metal carbides and nitrides, are promising materials for electrochemical energy storage application due to their redox-active surface and flexible interlayer space. Among all reported MXene-based electrodes, some have shown significantly better high-rate energy storage capabilities. Hence, it is crucial to...review 2021
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Bannenberg, L.J. (author), Schreuders, H. (author), Dam, B. (author)Hydrogen detection in a reliable, fast, and cost-effective manner is a prerequisite for the large-scale implementation of hydrogen in a green economy. Thin film Ta<sub>1−y</sub>Pd<sub>y</sub> is presented as an effective optical sensing material with extremely wide sensing ranges covering at least 7 orders of magnitude in hydrogen pressure....journal article 2021
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Bannenberg, L.J. (author), Boshuizen, B. (author), Nugroho, Ferry Anggoro Ardy (author), Schreuders, H. (author)Catalyzing capping layers on metal hydrides are employed to enhance the hydrogenation kinetics of metal hydride-based systems such as hydrogen sensors. Here, we use a novel experimental method to study the hydrogenation kinetics of catalyzing capping layers composed of several alloys of Pd and Au as well as Pt, Ni, and Ru, all with and without...journal article 2021
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Bannenberg, L.J. (author), Schreuders, H. (author), Kim, H.J. (author), Sakaki, Kouji (author), Hayashi, Shigenobu (author), Ikeda, Kazutaka (author), Otomo, Toshiya (author), Dam, B. (author), Asano, Kohta (author)Metal hydrides may play a paramount role in a future hydrogen economy. While most applications are based on nanostructured and confined materials, studies considering the structural response of these materials to hydrogen concentrate on bulk material. Here, using in situ in- and out-of-plane X-ray diffraction and reflectometry, we study the fcc ...journal article 2021
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Chaykina, D. (author), Nafezarefi, F. (author), Colombi, G. (author), Cornelius, S. (author), Bannenberg, L.J. (author), Schreuders, H. (author), Dam, B. (author)Thin films of rare earth metal oxyhydrides show a photochromic effect, the precise mechanism of which is yet unknown. Here, we made thin films of NdH3-2xOx and show that we can change the band gap, crystal structure, and photochromic contrast by tuning the composition (O2-:H-) via the sputtering deposition pressure. To protect these films...journal article 2021
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Bannenberg, L.J. (author), Boelsma, C. (author), Asano, Kohta (author), Schreuders, H. (author), Dam, B. (author)Hydrogen is playing a key role in the transition to a sustainable economy and in a variety of industrial processes. For its safe handling, the detection of hydrogen in a fast, reliable and accurate manner is crucial. Thin film metal hydride based optical hydrogen sensors provide an attractive option to sense hydrogen in a variety of conditions...journal article 2020
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Bannenberg, L.J. (author)Magnetic skyrmions are two-dimensional topologicallyprotected spin textureswith particle like properties which may crystallize inlattices that are typically oriented perpendicular to the magnetic field. Theirfirst observation was in the archetype...doctoral thesis 2019
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Bannenberg, L.J. (author), Wilhelm, Heribert (author), Cubitt, Robert (author), Labh, A. (author), Schmidt, Marcus P. (author), Lelievre-Berna, Eddy (author), Pappas, C. (author), Mostovoy, Maxim (author), Leonov, Andrey O. (author)Magnetic skyrmions are topologically protected nanoscale spin textures with particle-like properties. In bulk cubic helimagnets, they appear under applied magnetic fields and condense spontaneously into a lattice in a narrow region of the phase diagram just below the magnetic ordering temperature, the so-called A-phase. Theory, however, predicts...journal article 2019
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Bannenberg, L.J. (author), Nugroho, Ferry Anggoro Ardy (author), Schreuders, H. (author), Norder, B. (author), Trinh, Thuy-Trang (author), Steinke, N.J. (author), van Well, A.A. (author), Langhammer, Christoph (author), Dam, B. (author)Nanostructured metal hydrides are able to efficiently detect hydrogen in optical sensors. In the literature, two nanostructured systems based on metal hydrides have been proposed for this purpose each with its own detection principle: continuous sub-100 nm thin films read out via optical reflectance/transmittance changes and nanoparticle arrays...journal article 2019
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Bannenberg, L.J. (author), Sadykov, R. (author), Dalgliesh, R. M. (author), Goodway, C. (author), Schlagel, D. L. (author), Lograsso, T. A. (author), Falus, P. (author), Lelièvre-Berna, E. (author), Pappas, C. (author)The archetype cubic chiral magnet MnSi is home to some of the most fascinating states in condensed matter, such as skyrmions and a non-Fermi-liquid behavior in conjunction with a topological Hall effect under hydrostatic pressure. Using small angle neutron scattering, we study the evolution of the helimagnetic, conical, and skyrmionic...journal article 2019
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- Mirebeau, I. (author), Martin, N (author), Deutsch, M. (author), Bannenberg, L.J. (author), Pappas, C. (author), Chaboussant, G. (author), Cubitt, R (author), Decorse, C. (author), Leonov, A.O. (author) journal article 2018
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Sadykov, Ravil (author), Pappas, C. (author), Bannenberg, L.J. (author), Dalgliesh, Robert M. (author), Falus, Péter (author), Goodway, Christopher (author), Lelièvre-Berna, Eddy (author)We have developed and realised a compact high-pressure clamp cell of the piston-cylinder type for Small Angle Neutron Scattering (SANS) and Neutron Spin Echo (NSE) spectroscopy measurements. The cell can pressurise φ5 mm samples up to 1.5 GPa. It is non-magnetic, produces a sufficiently low and flat SANS background with a relatively good...journal article 2018
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Qian, F. (author), Bannenberg, L.J. (author), Wilhelm, Heribert (author), Chaboussant, Grégory (author), Debeer-Schmitt, Lisa M. (author), Schmidt, Marcus P. (author), Aqeel, Aisha (author), Palstra, Thomas T.M. (author), Brück, E.H. (author), Lefering, A.J.E. (author), Pappas, C. (author), Mostovoy, Maxim (author), Leonov, Andrey O. (author)The lack of inversion symmetry in the crystal lattice of magnetic materials gives rise to complex noncollinear spin orders through interactions of a relativistic nature, resulting in interesting physical phenomena, such as emergent electromagnetism. Studies of cubic chiral magnets revealed a universal magnetic phase diagram composed of...journal article 2018
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Bannenberg, L.J. (author), Qian, F. (author), Dalgliesh, R. M. (author), Martin, N (author), Chaboussant, G. (author), Schmidt, M (author), Schlagel, D. L. (author), Lograsso, T. A. (author), Wilhelm, H (author), Pappas, C. (author)Magnetic skyrmions are nanosized topologically protected spin textures with particlelike properties. They can form lattices perpendicular to the magnetic field, and the orientation of these skyrmion lattices with respect to the crystallographic lattice is governed by spin-orbit coupling. By performing small-angle neutron scattering measurements,...journal article 2017
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Bannenberg, L.J. (author), Kakurai, K. (author), Falus, P. (author), Lelievre-Berna, E. (author), Dalgliesh, R. (author), Dewhurst, C.D. (author), Qian, F. (author), Onose, Y. (author), Endoh, Y. (author), Tokura, Y. (author), Pappas, C. (author)We present a comprehensive Small Angle Neutron Scattering (SANS) and Neutron Spin Echo Spectroscopy (NSE) study of the structural and dynamical aspects of the helimagnetic transition in Fe<sub>1-x</sub>Co<sub>x</sub>Si with x = 0.30. In contrast to the sharp transition observed in the archetype chiral magnet MnSi, the transition in Fe<sub>1-x<...journal article 2017
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Pappas, C. (author), Bannenberg, L.J. (author), Lelièvre-Berna, E. (author), Qian, F. (author), Dewhurst, C. D. (author), Dalgliesh, R. M. (author), Schlagel, D. L. (author), Lograsso, T. A. (author), Falus, P (author)The reference chiral helimagnet MnSi is the first system where Skyrmion lattice correlations have been reported. At a zero magnetic field the transition at TC to the helimagnetic state is of first order. Above TC, in a region dominated by precursor phenomena, neutron scattering shows the buildup of strong chiral fluctuating correlations over...journal article 2017
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Boelsma, C. (author), Bannenberg, L.J. (author), Van Setten, M. J. (author), Steinke, N.J. (author), van Well, A.A. (author), Dam, B. (author)Hydrogen detection is essential for its implementation as an energy vector. So far, palladium is considered to be the most effective hydrogen sensing material. Here we show that palladium-capped hafnium thin films show a highly reproducible change in optical transmission in response to a hydrogen exposure ranging over six orders of magnitude...journal article 2017
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Bannenberg, L.J. (author), Lefering, A.J.E. (author), Kakurai, K. (author), Onose, Y (author), Endoh, Y. (author), Tokura, Y (author), Pappas, C. (author)We present a systematic study of the ac susceptibility of the chiral magnet Fe1−xCoxSi with x=0.30 covering four orders of magnitude in frequencies from 0.1 Hz to 1 kHz, with particular emphasis to the pronounced history dependence. Characteristic relaxation times ranging from a few milliseconds to tens of seconds are observed around the...journal article 2016