Article
Physics, Multidisciplinary
N. S. Bingham, X. Zhang, J. Ramberger, O. Heinonen, C. Leighton, P. Schiffer
Summary: In this study, we investigated the temperature and magnetic field dependence of the total magnetic moment of large-area permalloy artificial square spin ice arrays. Our findings showed that the hysteresis behavior and temperature dependence are consistent with the Stoner-Wohlfarth model, with deviations observed at small lattice spacing due to interisland interactions. Through micromagnetic simulations, we further explored the complex magnetization reversal induced by interisland interactions, highlighting the critical role of island shapes in tuning the physical properties of artificial spin ice structures and other nanomagnet systems.
PHYSICAL REVIEW LETTERS
(2022)
Article
Multidisciplinary Sciences
Gary W. Paterson, Gavin M. Macauley, Rair Macedo
Summary: The study found that a simple point dipole model works relatively well for square ice, but fails to replicate the properties observed in recent experiments with pinwheel ice. Parameterization of the reversal barrier in a Stoner-Wohlfarth model improves upon this, but does not fully capture the physics of ferromagnetic coupling observed in pinwheel structures.
ADVANCED THEORY AND SIMULATIONS
(2021)
Review
Chemistry, Multidisciplinary
Viviana Maffeis, Lukas Heuberger, Anamarija Nikoletic, Cora-Ann Schoenenberger, Cornelia G. Palivan
Summary: This article reviews the exponential growth of research on artificial cells and organelles, highlighting their potential for advancing fundamental biological processes. It focuses on the construction of artificial cells using micro- and nanoscale polymer-based compartments, exploring their varied chemistry for customizable assembly. The review delves into the architecture, usage, functional aspects, and communication of artificial cells, shedding light on the development of sophisticated multifunctional systems.
Article
Chemistry, Inorganic & Nuclear
Kai-Ping Xie, Si-Guo Wu, Long-Fei Wang, Guo-Zhang Huang, Zhao-Ping Ni, Ming-Liang Tong
Summary: Two new two-dimensional coordination polymers have been constructed, with compound 1 exhibiting spin-crossover behavior under normal atmospheric pressure and compound 2 showing paramagnetic behavior at measured temperatures. The fine-tuning of the monodentate ligand can modulate the ligand field and packing fashions, providing insights for developing new spin-crossover materials.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Multidisciplinary
Susmita Saha, Jingyuan Zhou, Kevin Hofhuis, Attila Kakay, Valerio Scagnoli, Laura J. Heyderman, Sebastian Gliga
Summary: Artificial spin ices are periodic arrangements of nanomagnets with interacting properties that can be used to create functional materials such as magnonic crystals. Symmetry breaking plays a significant role in defining mode profiles, and the mode spectra exhibit signatures of long-range interactions in the system.
Article
Physics, Multidisciplinary
Francesco Caravelli, Gia-Wei Chern, Cristiano Nisoli
Summary: This article presents a proposal for an electrical memory reminiscent of a memristor in connected Kagome artificial spin ice and simulates two scenarios to observe the memory behavior.
NEW JOURNAL OF PHYSICS
(2022)
Article
Polymer Science
Elena Platonova, Polina Ponomareva, Zalina Lokiaeva, Alexander Pavlov, Vladimir Nelyub, Alexander Polezhaev
Summary: The ability to form blends between the prepolymer and curing agent is crucial for efficient healing in self-healing materials. This study presents a new series of di- and tetrafuranic isocyanate-related ureas as promising curing agents for the development of polyurethanes-like self-healing materials. The self-healing properties of the materials were investigated by thermal analysis, and the resulting polyurethane showed thermally induced self-healing abilities.
Article
Chemistry, Inorganic & Nuclear
Badriah J. Alamer, Megalamane S. Bootharaju, Sergey M. Kozlov, Zhen Cao, Aleksander Shkurenko, Saidkhodzha Nematulloev, Partha Maity, Omar F. Mohammed, Mohamed Eddaoudi, Luigi Cavallo, Jean-Marie Basset, Osman M. Bakr
Summary: A novel synthesis strategy was developed to produce the smallest crystallized Ag NC to date, with a unique structure and shape. Experimental and computational studies confirmed the distinctive optical properties and molecular orbitals responsible for electronic transitions of the NC. These findings will pave the way for the design of novel metal NCs with directional self-assembled building blocks.
INORGANIC CHEMISTRY
(2021)
Article
Multidisciplinary Sciences
J. M. Ni, Y. Y. Huang, E. J. Cheng, Y. J. Yu, B. L. Pan, Q. Li, L. M. Xu, Z. M. Tian, S. Y. Li
Summary: Spin liquids are exotic states with highly entangled and fluctuating spins in frustrated systems, and they do not exhibit spontaneous symmetry breaking down to zero temperature. Excitations like magnetic monopoles, visons, and photons may emerge from quantum spin ice states, which are a special type of spin liquids found in pyrochlore lattices. The insulating nature of spin liquids is challenged by the metallic spin liquid Pr2Ir2O7, located at a zero-field quantum critical point. Thermal conductivity measurements on Pr2Ir2O7 reveal the absence of breakdown of Landau quasiparticles at the quantum critical point and the lack of mobile fermionic excitations, which helps constrain the description of quantum criticality in this material. Surprisingly, while the specific heats show anisotropy with respect to magnetic field directions, the thermal conductivities exhibit a giant but isotropic response, suggesting the importance of quadrupolar interactions and quantum fluctuations in determining the true ground state of the material.
NATURE COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
M. Goryca, X. Zhang, J. Li, A. L. Balk, J. D. Watts, C. Leighton, C. Nisoli, P. Schiffer, S. A. Crooker
Summary: Artificial spin ices can host plasmalike regimes with high density of mobile magnetic monopoles, dynamics of which are most diffusive in the plasma regime. This provides a new paradigm for probing the physics of effective magnetic charges in synthetic matter, with on-demand monopole regimes having field-tunable densities and dynamic properties.
Article
Chemistry, Multidisciplinary
Sergi Lendinez, Mojtaba T. Kaffash, M. Benjamin Jungfleisch
Summary: In this study, the intricate interplay of magnetization dynamics of two dissimilar ferromagnetic metals in a square artificial spin ice (ASI) network was exploited to modulate spin-wave properties effectively. Unique spectra attributed to each sublattice were observed, with inter- and intralattice dynamics facilitated by distinct magnetization properties of the two materials. By combining materials with dissimilar magnetic properties, a wide range of two-dimensional structures were realized, potentially leading to new concepts in nanomagnonics.
Article
Chemistry, Inorganic & Nuclear
Montserrat Ferrer, Albert Gallen, Manuel Martinez, Merce Rocamora, Rakesh Puttreddy, Kari Rissanen
Summary: New chiral tetranuclear square-like homo- and hetero-metallamacrocycles containing allyl-palladium and optically pure moieties have been successfully synthesized. The structures have been characterized by multinuclear NMR spectroscopy and MS spectrometry. XRD analysis confirms the structural characteristics of the new metallamacrocycles. These architectures have shown catalytic activity in asymmetric allylic alkylation reaction.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Multidisciplinary
Yutao Sang, Qirong Zhu, Xiaoqin Zhou, Yuqian Jiang, Li Zhang, Minghua Liu
Summary: This study describes the self-assembly of an achiral molecule into a macroscopic helical structure and the emergent chiral-selective spin-filtering effect. A benzene-1,3,5-tricarboxamide (BTA) motif with an aminopyridine group in each arm was found to coordinate with Ag-I and self-assemble into nanospheres. Symmetry breaking occurred upon sonication, resulting in the transformation of nanospheres into helical nanofibers with strong circular dichroism (CD) signals. The CD signals could be controlled by using the chiral assemblies as a seed. Additionally, the helical nanofibers exhibited highly selective charge transport with a spin-polarization transport of up to 45%, despite being composed exclusively of achiral building blocks.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Physics, Multidisciplinary
Kevin Hofhuis, Sandra Helen Skjaervo, Sergii Parchenko, Hanu Arava, Zhaochu Luo, Armin Kleibert, Peter Michael Derlet, Laura Jane Heyderman
Summary: This study investigates the magnetic phase transitions in artificial kagome-lattice spin ice. By controlling the interactions between nanomagnets, the researchers successfully observe the theoretically predicted phase transitions. They change the global symmetry of the system to achieve the transition from high-temperature phase to low-temperature ordered phase and find that the driving force for spin and charge ordering depends on the degeneracy strength at the vertex.
Article
Chemistry, Physical
Sergey Gudkovskikh, Mikhail Kirov
Summary: The processes of self-organization in a system of cubic water clusters of D2d and S4 symmetry were studied using the AMOEBA force field. It was found that ice nanotubes and spatial nanostructures formed by tubular fragments have a tendency to form. The linear relationship of the quadrupole moments of the cubic isomers D2d and S4 was established, but the quadrupole-quadrupole interaction is only significant at a great distance and of little use. The structure of ice nanotubes obtained by combining D2d and S4 isomers was studied and found to have significantly higher stabilization energy compared to other configurations of square ice nanotubes. An atlas of the most probable structures with the number of cubes from 2 to 4 is presented, along with discussions on the methods of joining nanotubes and some peculiarities of their growth.
Article
Engineering, Electrical & Electronic
A. V. Chumak, P. Kabos, M. Wu, C. Abert, C. Adelmann, A. O. Adeyeye, J. Akerman, F. G. Aliev, A. Anane, A. Awad, C. H. Back, A. Barman, G. E. W. Bauer, M. Becherer, E. N. Beginin, V. A. S. V. Bittencourt, Y. M. Blanter, P. Bortolotti, I. Boventer, D. A. Bozhko, S. A. Bunyaev, J. J. Carmiggelt, R. R. Cheenikundil, F. Ciubotaru, S. Cotofana, G. Csaba, O. V. Dobrovolskiy, C. Dubs, M. Elyasi, K. G. Fripp, H. Fulara, I. A. Golovchanskiy, C. Gonzalez-Ballestero, P. Graczyk, D. Grundler, P. Gruszecki, G. Gubbiotti, K. Guslienko, A. Haldar, S. Hamdioui, R. Hertel, B. Hillebrands, T. Hioki, A. Houshang, C. -M. Hu, H. Huebl, M. Huth, E. Iacocca, M. B. Jungfleisch, G. N. Kakazei, A. Khitun, R. Khymyn, T. Kikkawa, M. Klaui, O. Klein, J. W. Klos, S. Knauer, S. Koraltan, M. Kostylev, M. Krawczyk, I. N. Krivorotov, V. V. Kruglyak, D. Lachance-Quirion, S. Ladak, R. Lebrun, Y. Li, M. Lindner, R. Macedo, S. Mayr, G. A. Melkov, S. Mieszczak, Y. Nakamura, H. T. Nembach, A. A. Nikitin, S. A. Nikitov, V. Novosad, J. A. Otalora, Y. Otani, A. Papp, B. Pigeau, P. Pirro, W. Porod, F. Porrati, H. Qin, B. Rana, T. Reimann, F. Riente, O. Romero-Isart, A. Ross, A. V. Sadovnikov, A. R. Safin, E. Saitoh, G. Schmidt, H. Schultheiss, K. Schultheiss, A. A. Serga, S. Sharma, J. M. Shaw, D. Suess, O. Surzhenko, K. Szulc, T. Taniguchi, M. Urbanek, K. Usami, A. B. Ustinov, T. van der Sar, S. van Dijken, V. I. Vasyuchka, R. Verba, S. Viola Kusminskiy, Q. Wang, M. Weides, M. Weiler, S. Wintz, S. P. Wolski, X. Zhang
Summary: Magnonics is a discipline that explores the physical properties of spin waves and utilizes them for data processing. It offers several advantages, such as scalability to atomic dimensions, operation in high-frequency ranges, utilization of nonlinear and nonreciprocal phenomena, and compatibility with CMOS technology. Although primarily in the academic domain, extensive research is being conducted to address the scientific and technological challenges, with several proof-of-concept prototypes already realized in laboratories.
IEEE TRANSACTIONS ON MAGNETICS
(2022)
Article
Chemistry, Multidisciplinary
Felix Jungwirth, Daniel Knez, Fabrizio Porrati, Alfons G. Schuck, Michael Huth, Harald Plank, Sven Barth
Summary: The material composition and electrical properties of nanostructures obtained from focused electron beam-induced deposition (FEBID) using manganese and vanadium carbonyl precursors were investigated. The study found differences in composition and properties between FEBID and chemical vapor deposition (CVD) deposits, with FEBID deposits having insulating properties and a tendency for postgrowth oxidation.
Article
Physics, Applied
B. Budinska, B. Aichner, D. Yu Vodolazov, M. Yu Mikhailov, F. Porrati, M. Huth, A. Chumak, W. Lang, O. Dobrovolskiy
Summary: Ultrafast vortex motion has been extensively investigated. In this study, we found that in 15-nm-thick MoSi strips with smooth edges, critical currents were larger, maximal vortex velocities were higher, and relaxation times were shorter. Moreover, the deduction of intrinsic relaxation times from current-voltage curves requires careful consideration of sample quality and edge pinning.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Fabrizio Porrati, Felix Jungwirth, Sven Barth, Gian Carlo Gazzadi, Stefano Frabboni, Oleksandr Dobrovolskiy, Michael Huth
Summary: Focused ion beam induced deposition (FIBID) is a direct-write technique that allows the growth of nanostructures with high lateral resolution. In this study, FIBID is used to prepare dc-Josephson junction arrays (dc-JJA) consisting of superconducting NbC dots. The arrays are investigated for their microstructure and composition, and the superconductor-to-metal transition is studied by tuning the Josephson junction resistance. The prepared dc-JJA show robust properties and demonstrate the potential for fast preparation of complex device configurations using direct-write approaches.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
M. Kuess, F. Porrati, A. Hoerner, M. Weiler, M. Albrecht, M. Huth, A. Wixforth
Summary: In this study, the interaction between surface acoustic waves (SAWs) and spin waves (SWs) in a piezoelectric-magnetic thin film heterostructure was investigated. The transmission characteristics of magnetoacoustic waves in three adjacent magnetic micro-stripes were analyzed. The findings provide insights for the development of novel microwave devices and applications in magnonics.
Article
Nanoscience & Nanotechnology
Felix Jungwirth, Fabrizio Porrati, Daniel Knez, Masiar Sistani, Harald Plank, Michael Huth, Sven Barth
Summary: This study fills the gap in the limited reports on the differences between ion and electron beam induced deposition (FIBID/FEBID) for the same precursor species. It finds that H2Si(Co(CO)(4))(2) is a suitable precursor for the technique and that different deposition strategies can affect the material properties.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Markus Baranowski, Roland Sachser, Bratislav P. Marinkovic, Stefan Dj. Ivanovic, Michael Huth
Summary: In this study, we fabricated memristive devices using focused electron beam-induced deposition (FEBID) and observed the characteristic fingerprint of memristive behavior. The temperature dependence of charge transport inside the TiO2 layer was investigated and a valence change mechanism was deduced.
Article
Materials Science, Multidisciplinary
Sebastian Koelsch, Alfons Schuck, Michael Huth, Olena Fedchenko, Dmitry Vasilyev, Sergeij Chernov, Olena Tkach, Hans-Joachim Elmers, Gerd Schoenhense, Christoph Schlueter, Thiago R. F. Peixoto, Andrii Gloskowski, Cornelius Krellner
Summary: Bulk EuPd2Si2 undergoes a temperature-driven valence transition of europium that is correlated with a change in crystal lattice size. The epitaxial relationship between thin films of EuPd2Si2 and MgO(001) substrate is confirmed, with a strong coupling between the film and substrate. Transport measurements of resistivity and the Hall effect in a magnetic field indicate a phase transition in the film at temperatures between 16 to 20 K, suggesting magnetic ordering.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Fabrizio Porrati, Sven Barth, Gian Carlo Gazzadi, Stefano Frabboni, Oleksii M. Volkov, Denys Makarov, Michael Huth
Summary: Recent advancements in additive manufacturing have allowed the fabrication of free-shaped 3D objects with micrometer-scale feature sizes. Among these methods, focused electron beam and focused ion beam-induced deposition offer high flexibility and accuracy, providing a wide range of materials for growth. The combination of 3D nanowriting and chemical vapor deposition techniques enables the synthesis of complex core-shell heterostructures, showcasing great potential for unlocking further functionalities.
Article
Chemistry, Analytical
Andreas Pfuetzner, Barbora Tencer, Boris Stamm, Mandar Mehta, Preeti Sharma, Rustam Gilyazev, Hendrick Jensch, Nicole Thome, Michael Huth
Summary: The Sencell sensor uses osmotic pressure chamber and nano-granular tunneling resistive pressure sensors to measure glucose continuously in a small device. The miniaturized sensors showed reliable pressure changes in benchmark and dynamic glucose tests. The NTR pressure sensor technology successfully reduced the size of the core osmotic pressure chamber by more than 95% without compromising the osmotic pressure signal.
Article
Chemistry, Multidisciplinary
Alexander Kuprava, Michael Huth
Summary: Focused electron-beam-induced deposition (FEBID) is a versatile direct-write approach for 3D nanofabrication of functional materials. A new numerical simulation approach is described to study the influence of growth parameters on the shape of the 3D structures. The modular nature of the simulation method allows for future performance improvements using parallelization or graphics cards. Combining the simulation approach with beam-control pattern generation will optimize shape transfer for 3D FEBID.
Article
Chemistry, Multidisciplinary
Robert Winkler, Michele Brugger-Hatzl, Fabrizio Porrati, David Kuhness, Thomas Mairhofer, Lukas M. Seewald, Gerald Kothleitner, Michael Huth, Harald Plank, Sven Barth
Summary: This study provides solid evidence on the decomposition process of the HFeCo3(CO)(12) precursor, emphasizing the influence of microstructure and composition on the properties of electron beam-induced deposits. It reveals the activity of different fragmentation channels during single-spot growth processes.
Article
Chemistry, Multidisciplinary
Sebastian Lamb-Camarena, Fabrizio Porrati, Alexander Kuprava, Qi Wang, Michal Urbanek, Sven Barth, Denys Makarov, Michael Huth, Oleksandr V. Dobrovolskiy
Summary: Magnonics is a rapidly developing field in nanomagnetism, with potential applications in information processing systems. This study demonstrates the fabrication of 3D magnonic nanoconduits using the focused-electron-beam induced deposition (FEBID) technique. The researchers use Brillouin light scattering (BLS) spectroscopy to compare the spin-wave resonances of 2D and 3D nanostructures, revealing significant qualitative differences due to the non-uniformity of the internal magnetic field. This work highlights the additive manufacturing capability of FEBID for magnetic 3D nanoarchitectures and presents the first characterization of FEBID conduits using BLS spectroscopy.
Article
Materials Science, Multidisciplinary
Jun Ishihara, Takuya Suzuki, Go Kitazawa, Takachika Mori, Yuzo Ohno, Kensuke Miyajima
Summary: The spatiotemporal spin dynamics of two-dimensional electron spins in a GaAs quantum well were investigated using magneto-optical Kerr rotation measurements. The results showed that the ballistic movement of photoexcited spins resulted in a wave-packet-like motion of the spin distribution, which disappeared at higher spin densities and converged to the helical spin mode observed in the diffusive regime.
Article
Engineering, Electrical & Electronic
Anna Weitzer, Michael Huth, Gerald Kothleitner, Harald Plank
Summary: This study demonstrates the highly flexible and design possibilities of 3D nanoprinting via focused electron beam induced deposition (FEBID) at micro and nanoscale. The research investigates the growth behavior, influence of beam heating, and electron trajectories through experimental series and simulations. A modular Python tool is developed to accurately deposit 3D nanostructures layer-by-layer, laying the foundation for fabricating complex nanoarchitectures for various applications in research and development.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
