Article
Chemistry, Physical
Chao Yang, Yuya Kita, Zenglu Song, Yasushi Takemura
Summary: This study analyzed the magnetization reversal of a FeCoV Wiegand wire using first-order reversal curves (FORCs), identifying the magnetization reversal of the soft and hard regions in the wire. The study clarified the predominantly irreversible magnetization process of the soft layer and the magnetic intermediate region between the soft and hard regions.
Article
Chemistry, Physical
Ana Maria Cabanas, Rafael Perez del Real, David Laroze, Manuel Vazquez
Summary: Amorphous microwires have been widely studied due to their useful technological applications, with their bistable magnetic response determined by magnetostriction. First-order reversal curves (FORC) analysis is crucial for understanding the magnetization reversal processes in ferromagnetic systems and provides deeper insights compared to standard hysteresis loops. This study presents a systematic experimental analysis of FORC diagrams for magnetostrictive microwires with individually bistable hysteresis loops, from single microwires to sets of coupled microwires, bridging the gap between individual wires and the standard many-body problem. The study reveals the coercivity and interaction fields in microwire sets and demonstrates that FORC analysis offers a more comprehensive understanding of the complex response generated by intrinsic switching field fluctuations.
Article
Geochemistry & Geophysics
Andrew P. Roberts, Xiang Zhao, Pengxiang Hu, Alexandra Abrajevitch, Yen-Hua Chen, Richard J. Harrison, David Heslop, Zhaoxia Jiang, Jinhua Li, Qingsong Liu, Adrian R. Muxworthy, Hirokuni Oda, Hugh St C. O'Neill, Brad J. Pillans, Tetsuro Sato
Summary: Hematite carries important magnetic signals for various studies, and analyzing FORC diagrams can provide insights into the domain state and magnetostatic interactions of magnetic particles. The features observed in hematite samples, such as ridge-type and kidney-shaped FORC signatures, are influenced by the triaxial basal plane anisotropy of the mineral. The balance between uniaxial and triaxial switching determines the dominant FORC distribution type in a sample, explaining the intrinsic magnetization switching and anisotropy features of hematite.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Nanoscience & Nanotechnology
Alejandra Ruiz-Clavijo, Olga Caballero-Calero, David Navas, Amanda A. Ordonez-Cencerrado, Javier Blanco-Portals, Francesca Peiro, Ruy Sanz, Marisol Martin-Gonzalez
Summary: Understanding the collective magnetic behavior of interconnected magnetic nanostructures is crucial for predicting and controlling the advanced functionalities of 3D integrated magnetic nanostructures. This study focuses on interconnected nickel nanowires forming intricate and ordered magnetic systems, and investigates their magnetization reversal processes and anisotropic magnetic responses. Experimental characterization and micromagnetic simulations reveal the complex magnetic interactions that dominate the collective response of the system.
ADVANCED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Samuel Dobak, Peter Kollar, Jan Fuzer, Radovan Bures, Maria Faberova
Summary: Replacing conventional non-magnetic binder with insulating spinel ferrite in soft magnetic iron composites enhances interparticle coupling and suppresses eddy currents. The limitations of macroscopic characterization are overcome using first-order reversal curves analysis. The mechanism of ferrite coating as a matrix, evolving from beneficial coupling at low concentrations to reappearing demagnetizing interactions at higher fractions, is evidenced.
Article
Materials Science, Multidisciplinary
Tian-Chi Ji, Min-Xiang Pan, Hong-Liang Ge, Qiong Wu, Zhang Pengyue
Summary: The present work investigated the magnetization reversal behavior of Zr-doped (Nd0.8Ce0.2)(2)Fe12Co2-xZrxB (x = 0, 0.5) permanent alloys with high coercivity, showing that the Zr-doped sample exhibits higher magnetic properties and its reverse process can be explained by the pinning model.
Article
Chemistry, Physical
Liang Jiang, Chao Yang, Zenglu Song, Yasushi Takemura
Summary: This study aims to elucidate the magnetization reversal in the Wiegand wire by using a first-order reversal curve (FORC) diagram method. The results demonstrate a significant magnetization reversal in various components of the wire under an applied magnetic field.
Article
Materials Science, Multidisciplinary
Akash Surampalli, Ramon Egli, Deepak Prajapat, Carlo Meneghini, V. Raghavendra Reddy
Summary: BaSn0.15Ti0.85O3 exhibits diffuse phase transition and reentrant behavior near room temperature, along with frequency dispersion and decrease in remanent polarization. The relaxor nature in the system is found responsible for the reentrant behavior, supported by the analysis of first-order reversal curves and local probe techniques.
Article
Chemistry, Physical
Guorong Sha, Chao Yang, Zenglu Song, Yasushi Takemura
Summary: This study analyzed the magnetic properties of Wiegand wires at various lengths using first-order reversal curves (FORCs) and evaluated the FORC diagram. The unique magnetization reversal feature and the polarity of FORC distribution were clarified.
Article
Multidisciplinary Sciences
Dustin A. Gilbert, Peyton D. Murray, Julius De Rojas, Randy K. Dumas, Joseph E. Davies, Kai Liu
Summary: The FORC method is a powerful technique for analyzing complex systems by capturing magnetic phase separation and interactions using minor hysteresis loop analysis. By selectively integrating the measured FORC distribution, phase-resolved magnetic hysteresis loops can be reconstructed to determine traditional metrics of the identified phases. This technique has been successfully demonstrated on three representative material systems with excellent agreement with direct measured major loops and phase separated loops.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Xinqin Lu, Shan Tang, Weijie Chen, Jingcai Xu, Yunxiong Zeng, Xinqing Wang, Xiaoling Peng, Jing Li, Bo Hong
Summary: In this study, α-Fe2O3/g-C3N4 composites were successfully synthesized and characterized using various techniques. The uniform dispersion of g-C3N4 around α-Fe2O3 nanowires to form the composite material was observed, and an enhancement in the exchange bias field was discovered.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Geosciences, Multidisciplinary
Andrew P. Roberts, David Heslop, Xiang Zhao, Hirokuni Oda, Ramon Egli, Richard J. Harrison, Pengxiang Hu, Adrian R. Muxworthy, Tetsuro Sato
Summary: The magnetic domain state of a material determines its magnetic properties. However, constraining the domain state of magnetic components within complex natural mineral assemblages is challenging. First-order reversal curve (FORC) diagrams have been developed as a diagnostic tool for domain state identification. Recent developments include enhanced domain state diagnosis, recognition of vortex state signatures, identification of magnetic anisotropy types, and machine learning approaches for optimal FORC distribution selection. Additionally, a new FORC measurement protocol enables identification of magnetically viscous particles and quantitative separation of magnetic mineral mixtures.
EARTH-SCIENCE REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Seyed Nourallah Attyabi, Seyyed Ali Seyyed Ebrahimi, Zahra Lalegani, Bejan Hamawandi
Summary: The magnetic behavior of bulk composite alloys containing Mn-Al-C and alpha-Fe nanoparticles was investigated. The addition of alpha-Fe significantly affected the magnetic properties and demagnetization behavior of the nanostructured bulk magnets. The sample with 5 wt. % alpha-Fe showed the highest increase in remanence magnetization and (BH)(max) compared to the sample without alpha-Fe.
Article
Geochemistry & Geophysics
Kosuke Inoue, Toshitsugu Yamazaki, Yoichi Usui
Summary: This study evaluated the influence of magnetofossils on relative paleointensity estimations using first-order reversal curve (FORC) diagrams. The research found that the abundance of biogenic magnetic minerals in sediments may affect the estimations of relative paleointensity of the geomagnetic field.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2021)
Article
Materials Science, Multidisciplinary
B. B. Nayak, S. Narayana Jammalamadaka
Summary: The study focuses on the first-order reversal curves (FORC) and the effect of defects on the magnetization process in Fe71Ga29 thin films with different sputtering power. The reversible and irreversible contributions to the magnetization are analyzed through minor loop parameters, with the energy loss coefficient decreasing as the sputtering power increases. The FORC analysis suggests narrow switching and lower coercivity distribution at higher sputtering power due to fewer defects.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Roland Sachser, Johanna Huetner, Christian H. Schwalb, Michael Huth
Summary: Scanning Hall probe microscopy is used for minimally invasive characterization of magnetic thin films and nanostructures by measuring the emanating magnetic stray field. Sensor probes typically use highly miniaturized spin-valve elements or semimetals. Nanogranular ferromagnetic Hall devices fabricated by direct-write method can be tailor-made for any probe geometry and the magnetic stray field sensitivity can be optimized in situ.
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
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)