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Skyrmions and skyrmioniums are topologically non-trivial spin textures found in chiral magnetic systems. Understanding the dynamics of these particle-like excitations is crucial for leveraging their diverse functionalities in spintronic devices. This study investigates the dynamics and evolution of chiral spin textures in [Pt/Co]/Ru/[Co/Pt] multilayers with ferromagnetic interlayer exchange coupling. By precisely controlling the excitation and relaxation processes through combined magnetic field and electric current manipulation, reversible conversion between skyrmions and skyrmioniums is achieved. Additionally, we observe the topological conversion from a skyrmionium to a skyrmion, characterized by the sudden emergence of the skyrmion Hall effect. The experimental realization of reversible conversion between distinct magnetic topological spin textures represents a significant development that promises to expedite the advancement of the next generation of spintronic devices.
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http://dx.doi.org/10.1038/s41467-023-39007-1 | DOI Listing |
Angew Chem Int Ed Engl
September 2025
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China.
Enhancing the energy conversion efficiency of fuel cells necessitates optimization of oxygen reduction reaction (ORR) under high-voltage conditions through improved Pt catalysis. This study introduces an electrocatalyst that uniformly anchors a high loading (40 wt%) of small Pt nanoparticles (3.2 nm) on a novel support: tellurium and nitrogen co-mediated graphitized mesoporous carbon (Te-N-GMC).
View Article and Find Full Text PDFFood Chem X
August 2025
School of Life Science, Anqing Normal University, Jixian North Road1318, Yixiu District, Anqing 246052, Anhui Province, China.
Frozen storage deteriorates the texture and digestibility of frozen rice dough by damaging gliadin structure and starch integrity. This study investigated carboxymethyl chitosan (CMCh) and sodium carboxymethyl cellulose (CMCNa) as cry-oprotectants to mitigate these effects. Comprehensive analysis utilizing nuclear magnetic resonance (NMR), texture profile analysis (TPA), dynamic contact angle measurement (DCAT21), reversed-phase high-performance liquid chromatography (RP-HPLC), and circular dichroism (CD) demonstrated that 1.
View Article and Find Full Text PDFJ Am Chem Soc
September 2025
State Key Laboratory of Petroleum Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, China.
The discovery of new weak supramolecular interactions and supramolecular synthons is essential for directing self-assembly processes with enhanced precision, diversity, and functionality in complex molecular architectures. Here, we report the controlled self-assembly of diverse supramolecular architectures by a new directional bonding approach through the integration of radical-based dynamic covalent chemistry and supramolecular synthons. A novel macrocyclic synthon, , with a linear direction is constructed via radical-based dynamic covalent bonds from the phenothiazine building block substituted with two dicyanomethyl radicals.
View Article and Find Full Text PDFJ Am Chem Soc
September 2025
Kathleen Lonsdale Materials Chemistry, Department of Chemistry, University College London, London WC1H 0AJ, U.K.
The exceptional performance of ceria (CeO) in catalysis and energy conversion is fundamentally governed by its defect chemistry, particularly oxygen vacancies. The formation of each oxygen vacancy (V) is assumed to be compensated by two localized electrons on cations (Ce). Here, we show by combining theory with experiment that while this 1 V: 2Ce ratio accounts for the global charge compensation, it does not apply at the local scale, particularly in nanoparticles.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2025
School of Integrated Circuits, State Key Laboratory of New Textile Materials and Advanced Processing, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Huazhong University of Science and Technology, Wuhan, 430074, China.
Low-temperature rechargeable batteries face great challenges due to the sluggish reaction kinetics. Redox covalent organic frameworks (COFs) with porous structures provide a viable solution to accelerate the ionic diffusion and reaction kinetics at low temperatures. However, the applications of COFs in low-temperature batteries are still at their infancy stage.
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