Results 81 to 90 of about 351,024 (329)

Scanning vortex microscopy reveals thickness-dependent pinning nano-network in superconducting niobium films

open access: yesCommunications Materials
The presence of quantum vortices determines the electromagnetic response of superconducting materials and devices. Controlling the motion of vortices and their pinning on intrinsic and artificial defects is therefore essential for further development of ...
Razmik A. Hovhannisyan   +14 more
doaj   +1 more source

Meissner response of superconductors with inhomogeneous penetration depths

open access: yes, 2011
We discuss the Meissner response to a known field source of superconductors having inhomogeneities in their penetration depth. We simplify the general problem by assuming that the perturbations of the fields by the penetration depth inhomogeneities are ...
Kirtley, J. R., Kogan, V. G.
core   +1 more source

Atomic Size Misfit for Electrocatalytic Small Molecule Activation

open access: yesAdvanced Functional Materials, EarlyView.
This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong   +3 more
wiley   +1 more source

Magnetic properties and microstructures of high heat-resistance Sm-Co magnets with high Fe and low Zr content

open access: yesAIP Advances, 2019
The magnetic properties and microstructures of 2-17 type Sm-Co magnets with high Fe and low Zr content were investigated. The developed magnet achieved maximum energy product, [BH]m of 34.5 MGOe, intrinsic coercivity, Hcj of 21.3 kOe and squareness of 73.
Hiroaki Machida   +5 more
doaj   +1 more source

Nanotribology

open access: yesCHIMIA, 2002
The study of friction and wear processes on the nanometer scale is related to the development of the atomic force microscope, where laser beams and piezoelectric elements are used to detect the motion of a micro tip across a surface in a ...
Enrico Gnecco   +2 more
doaj   +1 more source

Enhancing CoFe Catalysts with V2CTX MXene‐Derived Materials for Anion Exchange Membrane Electrolyzers

open access: yesAdvanced Functional Materials, EarlyView.
MXene dervied CoFe composites show increased initial Oxygen Evolution Reaction (OER) activity compared to the pure CoFe and MXene in an Anion Exchange Membrane device. Vanadium vacancies in the MXene plays a role in increased OER activity and hinders Fe leaching in the AEM device over using the pure V2C MXene as a support material for the CoFe ...
Can Kaplan   +16 more
wiley   +1 more source

Switching of +/-360deg domain wall states in a nanoring by an azimuthal Oersted field

open access: yes, 2011
We demonstrate magnetic switching between two $360^\circ$ domain wall vortex states in cobalt nanorings, which are candidate magnetic states for robust and low power MRAM devices.
A S Licht   +8 more
core   +1 more source

Light‐Controlled Reversible Coassembly of Hybrid Functional Nanostructures

open access: yesAdvanced Functional Materials, EarlyView.
Light‐responsive hybrid nanostructures are formed by coassembling azobenzene‐ and PAH‐functionalized nanoparticles through reversible an tunable π interactions. The system enables tunable coupling between distinct components such as gold and magnetite or carbon nanotubes, producing switchable optical and magnetic properties under light and magnetic ...
Michal Sawczyk   +5 more
wiley   +1 more source

Magnetic Force Microscopy of Magnetic Nanoparticles [PDF]

open access: yes, 2010
Presented here is a summary of the improvements made to a standard magnetic force microscope for the imaging and spatial localization of magnetic nanoparticles.
Page, Michael
core  

Prospects of Electric Field Control in Perpendicular Magnetic Tunnel Junctions and Emerging 2D Spintronics for Ultralow Energy Memory and Logic Devices

open access: yesAdvanced Functional Materials, EarlyView.
Electric control of magnetic tunnel junctions offers a path to drastically reduce the energy requirements of the device. Electric field control of magnetization can be realized in a multitude of ways. These mechanisms can be integrated into existing spintronic devices to further reduce the operational energy.
Will Echtenkamp   +7 more
wiley   +1 more source

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