Article
Materials Science, Multidisciplinary
Mukesh Kumar Pandey, Asit Kumar Kar
Summary: The study investigated the effect of annealing temperature on the magnetic domain structure and surface mechanical properties of Ni-C composite thin films. The magnetic domain structures and surface friction of the films changed with varying annealing temperatures, showing a decreasing trend in surface friction as annealing temperature increased. Additionally, the pull-off force or adhesive force of the thin films decreased with higher annealing temperatures.
Article
Materials Science, Coatings & Films
Snejana Bakardjieva, Giovanni Ceccio, Jiri Vacik, Lucia Calcagno, Antonino Cannavo, Pavel Horak, Vasily Lavrentiev, Jiri Nemecek, Alena Michalcova, Robert Klie
Summary: This study investigates the structure and mechanical properties of Ti3InC2 thin nanocrystalline films produced by ion beam sputtering and irradiation, revealing that the structure and chemical composition remain intact at lower irradiation fluences but show significant morphological instability at higher fluences. The research suggests potential applications in extreme environments, such as nuclear facilities, but emphasizes the need for further study on the synthesis of high-quality, dense, and homogeneous Ti3InC2 thin nanocrystalline films.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Multidisciplinary Sciences
W. S. Huxter, M. L. Palm, M. L. Davis, P. Welter, C-H Lambert, M. Trassin, C. L. Degen
Summary: Quantum sensors based on spin defects in diamond have enabled detailed imaging of nanoscale magnetic patterns, and the gradiometry technique significantly enhances the measurement sensitivity of static fields, providing new opportunities in the imaging of weakly magnetic systems.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Multidisciplinary
Brindaban Ojha, Sougata Mallick, Sujit Panigrahy, Minaxi Sharma, Andre Thiaville, Stanislas Rohart, Subhankar Bedanta
Summary: Magnetic skyrmions are topologically stable spin swirling particles that hold promise for future spintronic devices. The low critical current density required for their motion makes them attractive for energy efficient electronic devices. In this study, the Pt/CoFeB/MgO heterostructures were investigated and skyrmions were successfully stabilized at room temperature. The presence of a low pinning landscape in the samples was confirmed by the distortion of skyrmion shape even under the influence of weak magnetic fields from low moment magnetic tips during magnetic force microscopy (MFM) scans. The threshold current density required to drive the skyrmions in our sample was found to be low, with velocities of few 10 m/s.
Article
Chemistry, Physical
P. T. Kolhe, A. B. Thorat, A. B. Phatangare, P. R. Jadhav, S. N. Dalvi, S. D. Dhole, S. S. Dahiwale
Summary: The synthesis, structure, and morphology of molybdenum disulfide (MoS2) thin films were studied using XRD and SEM, and the tensile strain induced by ion irradiation was found to be higher compared to gamma irradiation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Trygve M. Raeder, Shuyu Qin, Rama K. Vasudevan, Tor Grande, Joshua C. Agar, Michael J. Zachman
Summary: Ferroelectrics are increasingly used in electronic devices for extreme environments. This study investigates the collective switching behavior of ferroelectric domain structures and discovers high-speed switching with ordered domain walls. The findings have implications for high-speed tunable dielectrics and low-voltage ferroelectric memories and logic.
Article
Chemistry, Physical
M. Karlusic, R. A. Rymzhanov, J. H. O'Connell, L. Brockers, K. Tomic Luketic, Z. Siketic, S. Fazinic, P. Dubcek, M. Jaksic, G. Provatas, N. Medvedev, A. E. Volkov, M. Schleberger
Summary: The experimental study showed that Al2O3 and MgO surfaces exhibit distinct nanometric modifications when irradiated with 23 MeV I beam at a grazing incidence angle compared to normal incidence. Numerical simulations revealed that the presence of the surface inhibits recrystallization process, preventing transient tracks from recovery and forming observable nanopatterns. The differences in viscosities in molten states between Al2O3 and MgO explain the variation in nanostructures created on the surfaces.
SURFACES AND INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Binghao Guo, Alexander C. C. Lygo, Xi Dai, Susanne Stemmer
Summary: In this study, the observation of a quantum Hall state with a filling factor of zero in a thin film cadmium arsenide sample tuned by a gate voltage is reported, and possible mechanisms underlying this phenomenon are discussed.
Article
Materials Science, Multidisciplinary
S. K. Singh, Puneeta Tripathi, I Sulania, V. V. Siva Kumar, Pravin Kumar
Summary: Cu-doped ZnO nanocomposite thin films were synthesized by RF magnetron sputtering at room temperature, and irradiated with Ar ion beam at different fluences to tailor their physical properties. The study shows that ion beam irradiation can effectively modify the crystal structure and electrical properties of the films, providing a versatile tool for surface modification.
Article
Chemistry, Multidisciplinary
Niklas A. Weber, Hendrik Schmidt, Tim Sievert, Christian Jooss, Friedrich Guethoff, Vasily Moshneaga, Konrad Samwer, Matthias Krueger, Cynthia A. Volkert
Summary: This study investigates the mechanism of friction at sliding contacts, proposing that friction can be explained by considering the damping of stick-slip pulses. The findings provide a basis for reconciling controversies in literature studies on friction and suggest possible tactics for controlling friction.
Article
Chemistry, Physical
A. Talapatra, J. Arout Chelvane, J. Mohanty
Summary: The research reveals that high ion irradiation doses lead to changes in the magnetic properties of amorphous Tb-Fe-Co films, and the form of magnetic domain modification transitions from rapid domain wall motion to nucleation and propagation of reverse domains.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Sukhvinder Singh, Leon Abelmann, Haibin Gao, Uwe Hartmann
Summary: In this study, the domain configurations in Permalloy films were investigated using Magnetic Force Microscopy. The films were prepared at different Argon pressures and it was found that the Landau domain configuration appeared at low pressure while tulip and irregular domains were formed at higher pressure. Magnetic and structural characterizations showed an increase in coercivity and a decrease in Permalloy film density with increasing pressure.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bin Shi, Xuehui Gan, Haojie Lang, Kun Zou, Linfeng Wang, Junhui Sun, Yangyang Lu, Yitian Peng
Summary: Rubbing atomically thin MoS2 on a SiO2/Si substrate with an AFM tip under an electric field reduces friction significantly, leading to an ultra-low friction state. The charges transferring during rubbing process experimentally show electronic tight-binding with high interfacial bonding strength between MoS2 and the SiO2/Si substrate.
Article
Nanoscience & Nanotechnology
Cory D. Cress, Darshana Wickramaratne, Matthew R. Rosenberger, Zachariah Hennighausen, Patrick G. Callahan, Samuel W. LaGasse, Noam Bernstein, Olaf M. van 't Erve, Berend T. Jonker, Syed B. Qadri, Joseph C. Prestigiacomo, Marc Currie, Igor I. Mazin, Steven P. Bennett
Summary: In this work, we demonstrate the direct writing of nanoscale magnetic ordering patterns in FeRh films using focused helium-ion beam irradiation. By characterizing the changes in magnetic order induced by He+ irradiation, as well as quantifying strain- and defect-induced alterations in spin-flip energy, we show promise for the development of in-plane AF-FM spintronic devices. This approach may reduce the complexity of fabrication processes and eliminate interfacial polarization losses in such devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Michal Bodik, Michaela Sojkova, Martin Hulman, Milan Tapajna, Martin Truchly, Karol Vegso, Matej Jergel, Eva Majkova, Marianna Spankova, Peter Siffalovic
Summary: The tribological properties of MoS2 films can be optimized by adjusting the crystallographic orientation, leading to different friction behaviors. Horizontally oriented MoS2 sheets exhibit a lower coefficient of friction compared to vertically oriented sheets.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Syou-P'heng Do, Amine Missaoui, Alessandro Coati, Delphine Coursault, Haifa Jeridi, Andrea Resta, Nicolas Goubet, Michal M. Wojcik, Arnaud Choux, Sebastien Royer, Emrick Briand, Bertrand Donnio, Jean Louis Gallani, Brigitte Pansu, Emmanuel Lhuillier, Yves Garreau, David Babonneau, Michel Goldmann, Doru Constantin, Bruno Gallas, Bernard Croset, Emmanuelle Lacaze
Article
Materials Science, Multidisciplinary
Xiao Liu, Xiaolu Su, Clement Livache, Lise-Marie Chamoreau, Sebastien Sanaur, Lydia Sosa-Vargas, Jean-Charles Ribierre, David Kreher, Emmanuel Lhuillier, Emmanuelle Lacaze, Fabrice Mathevet
ORGANIC ELECTRONICS
(2020)
Article
Physics, Nuclear
A. Hirtl, D. F. Anagnostopoulos, D. S. Covita, H. Fuhrmann, H. Gorke, D. Gotta, A. Gruber, M. Hennebach, P. Indelicato, Th. S. Jensen, E. -O. Le Bigot, Y. -W. Liu, V. E. Markushin, J. Marton, M. Nekipelov, J. M. F. dos Santos, L. M. Simons, Th. Strauch, M. Trassinelli, J. F. C. A. Veloso, J. Zmeskal
Summary: The hadronic width of the ground state of pionic hydrogen has been redetermined by X-ray spectroscopy to be (856+/- 16stat+/- 22sys) meV. The experiment used a high-resolution Bragg spectrometer with spherically bent crystals to study the Coulomb de-excitation in detail and confirm the consistency with chiral perturbation theory.
EUROPEAN PHYSICAL JOURNAL A
(2021)
Article
Engineering, Electrical & Electronic
Alexandre Pasko, Alexis Pecheux, Muriel Tyrman, Loic Perriere, Ivan Guillot, Victor Etgens, Martino LoBue, Frederic Mazaleyrat
Summary: The kinetics of magnetization reversal in a rare-earth-free Mn-Al-C permanent magnet was investigated, with experiments conducted at different temperatures and various magnetic parameters measured. The results showed that magnetization reversal is temperature-dependent and involves a thermally activated mechanism, while wall thickness and crystallite size also play a role in magnetic-domain nucleation.
IEEE TRANSACTIONS ON MAGNETICS
(2021)
Article
Chemistry, Multidisciplinary
Anna Levy, Manuel De Anda Villa, Gaetan Laurens, Valerie Blanchet, John Bozek, Jerome Gaudin, Emily Lamour, Stephane Mace, Pierre Mignon, Aleksandar R. Milosavljevic, Christophe Nicolas, Minna Patanen, Christophe Prigent, Emmanuel Robert, Sebastien Steydli, Martino Trassinelli, Dominique Vernhet, Onni Vetelainen, David Amans
Summary: Pulsed laser ablation in liquid (PLAL) is a powerful method for producing nanoparticle colloids with long-term stability, and the stability is influenced by the reactivities and chemical equilibria at the nanoparticle/solvent interface. X-ray photoelectron spectroscopy can be used to evaluate the degree of nanoparticle surface oxidation and composition.
Article
Crystallography
Amine Missaoui, Emmanuelle Lacaze, Alexey Eremin, Ralf Stannarius
Summary: This study experimentally confirmed the theoretical prediction using fluorescence labeling, showing that defects with different strengths in freely suspended films in the smectic C phase move at different speeds during annihilation.
Article
Physics, Atomic, Molecular & Chemical
Mariette Jolly, Spyridon Voikopoulos, Emily Lamour, Alain Mery, Angela Braeuning-Demian, Jean-Yves Chesnel, Alexandre Gumberidze, Michael Lestinsky, Stephane Mace, Christophe Prigent, Jean-Marc Ramillon, Jimmy Rangama, Patrick Rousseau, Daniel Schury, Uwe Spillmann, Sebastien Steydli, Thomas Stoehlker, Martino Trassinelli, Dominique Vernhet
Summary: The design and performance of a newly built electrostatic charge state analyzer as a spectrometer for keV/u ions are reported. The analyzer consists of two curved electrodes enclosed by Matsuda electrodes. Tests using Ar9+ and Ar12+ ion beams at 10 keV per charge unit have shown good separation of different charge states formed during electron capture collisions. These tests have also identified three different background contributions on the detector that need to be reduced or suppressed.
Article
Physics, Atomic, Molecular & Chemical
Perla Dergham, Friedrich Aumayr, Emily Lamour, Stephane Mace, Christophe Prigent, Sebastien Steydli, Dominique Vernhet, Matthias Werl, Richard Arthur Wilhelm, Martino Trassinelli
Summary: This study investigates the use of X-rays produced during collisions between Highly Charged Ions (HCI) and sample surfaces to investigate the surface's magnetic properties. Results from proof-of-principle experiments involving an Ar17+ ion beam interacting with a nonmagnetic Si sample show a significant dependency of the X-ray spectra on the ion incidence angle, which will guide future ion-magnetic surface studies.
Article
Physics, Multidisciplinary
Lune Maillard, Fabio Finocchi, Martino Trassinelli
Summary: Nested sampling is an efficient method used for calculating Bayesian evidence and partition functions. It explores a dynamical set of sampling points to higher values of the sampled function. Different strategies, including slice sampling and clustering methods, are implemented in the nested_fit code to improve efficiency and accuracy. Benchmark tests show that slice sampling is the most stable and accurate search strategy.
Article
Physics, Atomic, Molecular & Chemical
Martino Trassinelli
Summary: High-accuracy spectroscopy requires careful spectral line modelling to avoid systematic errors. Bayesian statistics offers a solution by assigning probabilities to different hypotheses/models based on the same data set. This article presents practical applications in analyzing high-accuracy X-ray spectroscopy data and discusses methods for determining the most plausible profile and studying the presence of satellite peaks.
Article
Optics
Jorge Machado, Nancy Paul, Gabrielle Soum-Sidikov, Louis Duval, Stephane Mace, Robert Loetzsch, Martino Trassinelli, Paul Indelicato
Summary: We have performed an absolute, reference-free measurement of the 1s2s 3S1 -> 1s2 1S0 relativistic magnetic dipole transition in He-like sulfur. The transition energy obtained was compared to advanced bound-state quantum electrodynamics calculations, providing a significant test for two-electron QED effects and precision atomic structure methods in medium-Z species. The impact of different silicon crystal atomic form-factor models on the transition energy analysis was also evaluated, and no significant dependence on the model used was found.
Article
Optics
M. Trassinelli
Summary: By making minimal assumptions and within the realm of timeless formalism, conditional probabilities for subsequent measurements in the nonrelativistic regime can be derived. The Gleason-Bush theorem is used to unambiguously calculate one-time conditional probabilities, even in puzzling scenarios like Wigner's friend, without encountering paradoxical situations.
Article
Chemistry, Physical
Amine Missaoui, Kirsten Harth, Torsten Trittel, Christoph Klopp, Ralf Stannarius, Emmanuelle Lacaze
Summary: This study reports the wrinkling and bulging phenomenon of thin freely floating films of smectic liquid crystals under rapid compression in-plane. Different patterns, including specifically shaped bulges, radial wrinkles, and target-like wrinkle structures, were observed depending on the external stress and dimensions of the films. These patterns disappear reversibly when the external stress is relaxed.
Article
Chemistry, Physical
Sergii Snegir, Yannick J. Dappe, Oleksiy L. Kapitanchuk, Delphine Coursault, Emmanuelle Lacaze
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2020)
