1,721,069 research outputs found
Magnetisation reversal in cylindrical nickel nanobars involving magnetic vortex structure: A micromagnetic study
No full textStability of Larger Ferromagnetic Chain-of-sphere Nanostructure Comprising Magnetic Vortices
No full textAbstractChain-of-sphere (CoS) nanostructure containing Permalloy (Fe20Ni80) nanospheres of uniform size (d=50 nm) has been studied using micromagnetic simulation. These large-size Permalloy nanospheres support magnetic vortex structure upon relaxation. The presence of magnetic vortices in CoS architecture affects its magnetic properties significantly. Micromagnetic behaviour of Permalloy CoS system was studied focusing on the magnetization reversal process. The presence of magnetic vortices triggers a vortex creation and annihilation mechanism (VCA) involving the formation and breaking of an inversion symmetry (IS) feature. This VCA mechanism has been studied using 3D micromagnetic simulation and results of coercivity and vortex parameters are presented.</jats:p
ChemInform Abstract: Sulfate Chemistry for High‐Voltage Insertion Materials: Synthetic, Structural and Electrochemical Insights
No full textChemInform Abstract: Pursuit of Sustainable Iron‐Based Sodium Battery Cathodes: Two Case Studies
No full text
Alluaudite Class of High Voltage Sodium Insertion Materials: An Interplay of Polymorphism and Magnetism
No full textThe research and development with sodium ion batteries has geared up manifold in last one decade, owing to their abundance, non-toxicity, uniform geographical distribution and electrochemical performance complimentary to lithium counterpart. This research often leads to various novel material discoveries such as Na2Fe2(SO4)(3) sodium insertion material, which has recently registered the highest-ever Fe3+/Fe2+ redox potential (3.8 V vs. Na) having excellent cyclability and rate kinetics. This basically belongs to a family of materials-Alluaudites Na2M2(SO4)(3) (M: Fe, Mn, Co, Ni). Such cathode insertion compounds are basically functional materials, involving redox active 3d transition metals that are often magnetic in nature. We have investigated the magnetic structure and properties of - Alluaudites Na2M2(SO4)(3). These alluaudite shows wide structural diversity and polymorphism. Employing various experimental methods involving diffraction, magnetic susceptibility, Mossbauer spectroscopy and low temperature neutron powder diffraction data we have explored the magnetic properties exhibited by the Alluaudite class of insertion materials
- …
