Results 31 to 40 of about 2,325,129 (309)

Coupling Theory of Emergent Spin Electromagnetic Field and Electromagnetic Field [PDF]

Journal of the Physical Society of Japan, 2014
In ferromagnetic metals, an effective electromagnetic field which couples to conduction electron spin is induced by the sd exchange interaction. We investigate how this effective field, spin electromagnetic field, interacts with the ordinary electromagnetic field by deriving an effective Hamiltonian based on the path-integral formalism.
Kawaguchi, Hideo, Tatara, Gen
openaire   +2 more sources

Power module heat sink design optimization with ensembles of data-driven polynomial chaos surrogate models

e-Prime: Advances in Electrical Engineering, Electronics and Energy, 2022
We consider the problem of optimizing the design of a heat sink used for cooling an insulated gate bipolar transistor (IGBT) power module. The thermal behavior of the heat sink is originally estimated using a high-fidelity computational fluid dynamics ...
Dimitrios Loukrezis, Herbert De Gersem
doaj   +1 more source

Eddy current testing of metallic sheets with defects using force measurements [PDF]

Serbian Journal of Electrical Engineering, 2008
The problem of determining defects in structures using eddy current methods was investigated. The goal of this work is to demonstrate that the forces generated by the eddy currents and acting back on the magnet system can be used to detect defects in the
Brauer Hartmut, Ziolkowski Marek
doaj   +1 more source

The Structure of an Electromagnetic Field [PDF]

Proceedings of the National Academy of Sciences, 1918
This elementary field corresponds to a state of affairs in which electric charges of a concentrated form are created and travel along straight lines with the velocity of light, the directions of these lines being specified by the different values of the unit vector s.
openaire   +2 more sources

The plasmonic BTO-on-SiN platform – beyond 200 GBd modulation for optical communications

Light: Science & Applications
An integrated photonics platform that offers high-speed modulators in addition to low-loss and versatile passive components is highly sought after for different applications ranging from AI to next-generation Tbit/s links in optical fiber communication ...
Manuel Kohli, Daniel Chelladurai, Laurenz Kulmer, Tobias Blatter, Yannik Horst, Killian Keller, Michael Doderer, Joel Winiger, David Moor, Andreas Messner, Tatiana Buriakova, Clarissa Convertino, Felix Eltes, Yuriy Fedoryshyn, Ueli Koch, Juerg Leuthold   +15 more
doaj   +1 more source

Approximation and Uncertainty Quantification of Systems with Arbitrary Parameter Distributions using Weighted Leja Interpolation

Algorithms, 2020
Approximation and uncertainty quantification methods based on Lagrange interpolation are typically abandoned in cases where the probability distributions of one or more system parameters are not normal, uniform, or closely related distributions, due to ...
Dimitrios Loukrezis, Herbert De Gersem
doaj   +1 more source

A magic electromagnetic field [PDF]

, 2003
An electromagnetic field of simple algebraic structure is simply derived. It turns out to be the G=0 limit of the charged rotating Kerr-Newman metrics. These all have gyromagnetic ratio 2, the same as the Dirac electron. The charge and current distributions giving this high gyromagnetic ratio have charges of both signs rotating at close to the velocity
openaire   +2 more sources

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

Controlling photothermoelectric directional photocurrents in graphene with over 400 GHz bandwidth

Nature Communications
Photodetection in the near- and mid-infrared spectrum requires a suitable absorbing material able to meet the respective targets while ideally being cost-effective.
Stefan M. Koepfli, Michael Baumann, Robin Gadola, Shadi Nashashibi, Yesim Koyaz, Daniel Rieben, Arif Can Güngör, Michael Doderer, Killian Keller, Yuriy Fedoryshyn, Juerg Leuthold   +10 more
doaj   +1 more source

500 GHz plasmonic Mach-Zehnder modulator enabling sub-THz microwave photonics

APL Photonics, 2019
Broadband electro-optic intensity modulators are essential to convert electrical signals to the optical domain. The growing interest in terahertz wireless applications demands modulators with frequency responses to the sub-terahertz range, high power ...
Maurizio Burla, Claudia Hoessbacher, Wolfgang Heni, Christian Haffner, Yuriy Fedoryshyn, Dominik Werner, Tatsuhiko Watanabe, Hermann Massler, Delwin L. Elder, Larry R. Dalton, Juerg Leuthold   +10 more
doaj   +1 more source