Results 41 to 50 of about 2,675 (308)
Opportunities of Semiconducting Oxide Nanostructures as Advanced Luminescent Materials in Photonics
Advanced Materials, EarlyView.The review discusses the challenges of wide and ultrawide bandgap semiconducting oxides as a suitable material platform for photonics. They offer great versatility in terms of tuning microstructure, native defects, doping, anisotropy, and micro‐ and nano‐structuring. The review focuses on their light emission, light‐confinement in optical cavities, and
Ana Cremades +7 more
wiley +1 more source
Experimental investigation of dielectric wall material effects on low-power HEMP thruster
AIP Advances, 2020 The high efficiency multi-staged plasma (HEMP) thruster, also known as the cusped field thruster, becomes a candidate microthruster of new generation space observation missions for its low complexity and potential long life over a wide range of thrust ...
Ming Zeng +5 more
doaj +1 more source
Force probes for development and testing of different electric propulsion systems
EPJ Techniques and Instrumentation, 2022 Diagnostics with force probes in plumes of electric propulsion systems for spacecraft (thrusters) are presented. This contribution focuses on showing example measurements with force probes for the most common gridless ion thruster types.
Alexander Spethmann +7 more
doaj +1 more source
Evidence for Itinerant Ferromagnetic Flat Bands Producing Large Transverse Responses
Advanced Materials, EarlyView.Itinerant ferromagnetic flat bands are demonstrated in GdCo5 with a high Curie temperature of 940K, a stacked honeycomb–kagome lattice, through angle‐resolved photoemission spectroscopy and magneto‐thermoelectric measurements. These topological flat bands generate large Berry curvaturte, producing gigantic anomalous Nernst effect with record‐high ...
Susumu Minami +15 more
wiley +1 more source
Advanced Materials, EarlyView.Magnetic tunnel junctions (MTJs) using MgO tunnel barriers face challenges of high resistance‐area product and low tunnel magnetoresistance (TMR). To discover alternative materials, Literature Enhanced Ab initio Discovery (LEAD) is developed. The LEAD‐predicted materials are theoretically evaluated, showing that MTJs with dusting of ScN or TiN on ...
Sabiq Islam +6 more
wiley +1 more source
Advanced Materials, EarlyView.We demonstrate a neuromorphic synapse in 2D Fe3GaTe2 flakes. The device operates via a current‐driven transformation from a skyrmion‐lattice to a stripe‐domain state, yielding a linear anomalous Hall resistance response with a tunable slope to enable multiply‐accumulate operations. Simulations confirm its viability in artificial neural networks.
Jixiang Huang +20 more
wiley +1 more source
Advanced Materials, EarlyView.The field of polymer thermoelectrics is entering a new era, featuring breakthroughs in addressing the conventional performance disparity between p‐type and n‐type polymers, pioneering doping frontiers, and sophisticated decoupling strategies. This review explores innovations in molecular design and superior stabilities, bridging the gap from ...
Suhao Wang
wiley +1 more source
Influence of a power supply model on simulated Hall thruster discharge voltage oscillations
AIP Advances, 2019 Hall thrusters are spacecraft propulsion devices that generate and accelerate plasma to provide thrust. Despite the use of constant voltage supplies to power these devices, complex finite-rate and convective effects lead to significant discharge current ...
Lubos Brieda +2 more
doaj +1 more source
Triple Langmuir Probes Measurements of LaB6 Hollow Cathodes Plume
Frontiers in Physics, 2019 Lanthanum hexaboride hollow cathodes represent a viable option for high power Hall effect thruster applications, under development for the next generation of manned and robotic interplanetary missions.
Giulia Becatti +4 more
doaj +1 more source
On the onset of breathing mode in Hall thrusters and the role of electron mobility fluctuations
Frontiers in Physics, 2022 Breathing mode is an ionization instability which is observed ubiquitously in the operation of Hall thrusters. It is recognized as a relatively low frequency (10–30 kHz) longitudinal oscillation of the discharge current and the plasma parameters ...
L. Leporini +7 more
doaj +1 more source