Searched for: subject%3A%22Magnetic%255C%2Bfields%22
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Lodari, M. (author), Kong, O. (author), Rendell, M. (author), Tosato, A. (author), Sammak, A. (author), Veldhorst, M. (author), Hamilton, A.R. (author), Scappucci, G. (author)
We demonstrate that a lightly-strained germanium channel ("// = −0.41%) in an undoped Ge/Si0.1Ge0.9 heterostructure field effect transistor supports a 2D hole gas with mobility in excess of 1 × 106 cm2/Vs and percolation density less than 5 × 1010 cm−2. This low disorder 2D hole system shows tunable fractional quantum Hall effect at low density...
article 2022
document
de Gijsel, S.L. (author), Vijn, A.R.P.J. (author), Tan, R.G. (author)
This paper proposes an algorithm to localize a magnetic dipole using a limited number of noisy measurements from magnetic field sensors. The algorithm is based on the theory of compressed sensing, and exploits the sparseness of the magnetic dipole in space. Beforehand, a basis consisting of magnetic dipole fields belonging to individual dipoles...
article 2022
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Kulesh, I. (author), Ke, C.T. (author), Thomas, C. (author), Karwal, S. (author), Moehle, C.M. (author), Metti, S. (author), Kallaher, R. (author), Gardner, G.C. (author), Manfra, M.J. (author), Goswami, S. (author)
Indium-antimonide (InSb) two-dimensional electron gases (2DEGs) have a unique combination of material properties: high electron mobility, a strong spin-orbit interaction, a large Landé g factor, and a small effective mass. This makes them an attractive platform to explore a variety of mesoscopic phenomena ranging from spintronics to topological...
article 2020
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Pita-Vidal, M. (author), Bargerbos, A. (author), Yang, C.-K. (author), van Woerkom, D.J. (author), Pfaff, W. (author), Haider, S.N. (author), Krogstrup, P. (author), Kouwenhoven, L.P. (author), de Lange, G. (author), Kou, A. (author)
article 2020
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Hendrickx, N.W. (author), Tagliaferri, M.L.V. (author), Kouwenhoven, M. (author), Li, R. (author), Franke, D.P. (author), Sammak, A. (author), Brinkman, A. (author), Scappucci, G. (author), Veldhorst, M. (author)
We fabricate Josephson field-effect transistors in germanium quantum wells contacted by superconducting aluminum and demonstrate supercurrents carried by holes that extend over junction lengths of several micrometers. In superconducting quantum point contacts we observe discretization of supercurrent, as well as Fabry-Perot resonances,...
article 2019
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Kroll, J.G. (author), Borsoi, F. (author), van der Enden, K.L. (author), Uilhoorn, W. (author), de Jong, D. (author), Quintero-Perez, M. (author), van Woerkom, D.J. (author), Bruno, A. (author), Plissard, S.R. (author), Car, D. (author), Bakkers, E.P.A.M. (author), Cassidy, M.C. (author), Kouwenhoven, L.P. (author)
Superconducting coplanar-waveguide resonators that can operate in strong magnetic fields are important tools for a variety of high-frequency superconducting devices. Magnetic fields degrade resonator performance by creating Abrikosov vortices that cause resistive losses and frequency fluctuations or suppress the superconductivity entirely. To...
article 2019
document
Gül, O. (author), Zhang, H. (author), de Vries, F.K. (author), van Veen, J. (author), Zuo, K. (author), Mourik, V. (author), Conesa-Boj, S. (author), Nowak, M.P. (author), van Woerkom, D.J. (author), Quintero Pérez, M. (author), Cassidy, M.C. (author), Geresdi, A. (author), Koelling, S. (author), Car, D. (author), Plissard, S.R. (author), Bakkers, E.P.A.M. (author), Kouwenhoven, L.P. (author)
Topological superconductivity is a state of matter that can host Majorana modes, the building blocks of a topological quantum computer. Many experimental platforms predicted to show such a topological state rely on proximity-induced superconductivity. However, accessing the topological properties requires an induced hard superconducting gap,...
article 2017
document
Koeman, T. (author), van den Brandt, P.A. (author), Slottje, P. (author), Schouten, L.J. (author), Goldbohm, R.A. (author), Kromhout, H. (author), Vermeulen, R. (author)
Purpose: To investigate the association between exposure to occupational extremely low-frequency magnetic fields (ELF-MF) and the risk of a priori selected cancer outcomes within the prospective Netherlands Cohort Study. Methods: 120,852 men and women aged 55-69 years at time of enrollment in 1986 were followed up (17.3 years) for incident lung,...
article 2014
document
Koeman, T. (author), Slottje, P. (author), Kromhout, H. (author), Schouten, L.J. (author), Goldbohm, R.A. (author), van den Brandt, P.A. (author), Vermeulen, R. (author)
Objectives Although a study among utility workers found an increased risk for acute myocardial infarction and arrhythmia-related deaths associated with occupational extremely low-frequency magnetic fields (ELF-MF) exposure, later studies largely failed to replicate these findings. This study investigated the association between occupational ELF...
article 2013
document
Zwamborn, A.P.M. (author)
Voor het leven op aarde speelt het aardmagnetisch veld een cruciale rol om ons tegen deze stroom geladen deeltjes te beschermen. In extreme situaties merken we de effecten van ruimteweer zelfs op aarde. Inzicht in het ruimteweer is daarom belangrijk om tijdig te kunnen beoordelen of zonneactiviteit invloed kan uitoefenen op de aarde en de...
article 2012
document
Naus, H.W.L. (author)
The Jiles-Atherton effective field theory of ferromagnetic hysteresis is consistently extended to describe the magnetomechanical effect. Whereas Jiles has proposed two such models, one for constant stress and a different one for varying stress, our formalism includes both situations. It is also possible to simultaneously vary applied field and...
article 2011
document
de Baar, M.R. (author), Bongers, W.A. (author), van Berkel, M. (author), Doelman, N.J. (author), Hennen, B.A. (author), Nuij, P. (author), Oosterbeek, J.W. (author), Steinbuch, M. (author), Westerhof, E. (author), Witvoet, G. (author)
Resistive magneto-hydrodynamic instabilities are expected to limit the performance of nuclear fusion reactors. Prime examples are the sawtooth instability and the neoclassical tearing modes. The sawtooth instability will affect the refueling of the plasma core and the fast particle concentration. In reactor relevant conditions, the sawtooth can...
conference paper 2011
document
Derks, R.J.S. (author), Frijns, A.J.H. (author), Prins, M.W.J. (author), Dietzel, A.H. (author)
The forced motion of superparamagnetic particles and their multibody interactions are studied in view of the application as integrated fluid drivers in microchannel systems. Previous studies on particle manipulation in open fluid volumes serve as our starting point for the analysis of particle dynamics and interplay effects in confined fluid...
article 2010
document
Koning, J. (author), Jaspers, R. (author), Doornink, J. (author), Ouwehand, B. (author), Klinkhamer, J.F.F. (author), Snijders, B. (author), Sadakov, S. (author), Heemskerk, C. (author), TNO Industrie en Techniek (author)
Already in the early phase of a design for ITER, the maintenance aspects should be taken into account, since they might have serious implications. This paper presents the arguments in support of the case for the maintainability of the design, notably if this maintenance is to be performed by advanced remote methods. This structure is compliant...
article 2009
document
Roodenburg, B. (author), Evenblij, B.H. (author), TNO Defensie en Veiligheid (author)
The force acting on a current carrying body, which is induced by magnetic fields gained more interest due to new applications. These magnetic techniques are used for decades to accelerate or move objects, for instance for catheter navigation in the human body, metal forming or for fast opening of electrical circuit breakers. Due to the increase...
article 2008
document
Barrell, Y. (author), Naus, H.W.L. (author), TNO Defensie en Veiligheid (author)
Detection and localisation of hidden magnetic objects is studied. The concomitant disturbance of the earth magnetic field is exploited. Magnetic fields and or gradients are measured with a number of sensors. Two point models for magnetic fields are selected for the analysis: the magnetic dipole and its quadrupole extension. It is shown how to...
article 2007
document
Llombart, N. (author), Neto, A. (author), Gerini, G. (author), de Maagt, P. (author)
This paper deals with the design and the analysis of planar circularly symmetric (PCS) EBG structures. The analysis is concentrated on TM excitations. To obtain simple design rules for the PCS-EBG's, an equivalence is established between 2D-EBG's and PCS-EBG's. he dispersion equations are investigated first. The 2D problems are studied by means...
conference paper 2004
document
Bruni, S. (author), Llombart Juan, N. (author), Neto, A. (author), Gerini, G. (author), Maci, S. (author), TNO Fysisch en Elektronisch Laboratorium (author)
A general algorithm for the analysis of microstrip coupled leaky wave slot antennas was discussed. The method was based on the construction of physically appealing entire domain Methods of Moments (MoM) basis function that allowed a consistent reduction of the number of unknowns and of total computation time. The basis function obtained were...
conference paper 2004
document
TNO Defensie en Veiligheid (author), Bruni, S. (author), Llombart, N. (author), Neto, A. (author), Gerini, G. (author), Maci, S. (author)
A method is proposed for the analysis of arrays of linear printed antennas. After the formulation of pertinent set of integral equations, the appropriate equivalent currents of the Method of Moments are represented in terms of two sets of entire domain basis functions. These functions synthesize on one side the resonant behavior of the slot,...
conference paper 2004
document
Neto, A. (author), de Maagt, P. (author), Maci, S. (author)
A method is proposed for the analysis of slot antennas excited by coplanar waveguides. First, a standard integral equation for the continuity of the magnetic field is formulated. Then the appropriate equivalent magnetic currents of the method of moments are represented in terms of entire-domain basis functions which synthesize the resonant...
article 2003
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