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Effect of Heat Current on Magnetization Dynamics in Magnetic Insulators and Nanostructures

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Tailoring thermal properties of functional materials

Xavier François Mettan

Thermal conductivity (k) plays an essential role in functional devices. In some cases, high value is required to transfer heat efficiently. In others, low k assists in maintaining a temperature gradient necessary for device operation. It is profitable to d ...

EPFL2019

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A recent class of topological nodal-line semimetals with the general formula MSiX (M = Zr, Hf and X = S, Se, Te) has attracted much experimental and theoretical interest due to their properties, particularly their large magnetoresistances and high carrier ...

2019

Effective conductivity of porous ceramics in a radiative environment

Sophia Haussener, Clemens Gregor Suter, Jérémy Raphaël Mora-Monteros

The knowledge of the effective thermal conductivity, taking into account conduction and radiation, is crucial for the accurate prediction of the thermal behavior of porous foams, especially in an environment where radiation is dominating. We present a comb ...

2019

LTCC magnetic sensors at EPFL and TCV: Lessons learnt for ITER

Duccio Testa, Xavier Llobet, Matthieu Toussaint, Pierre Lavanchy, Ugo Siravo, Frédéric Dolizy, Steve Couturier, Severino Antonioni, Christian Moura, Jonathan Bryan Lister, Thomas Maeder, Philippe Marmillod, Caroline Jacq, Blaise Marlétaz, Aylwin Iantchenko, Lorenzo Stipani, Adrien Aymeric Thibault Corne, Matthias Garcin

Innovative 3D high-frequency magnetic sensors have been designed and manufactured in-house for installation on the Tokamak a Configuration Variable (TCV), and are currently routinely operational. These sensors combine the Low Temperature Co-fired Ceramic ( ...

2019

Radiation Performance of Highly Miniaturized Implantable Devices

Denys Nikolayev

Miniature wireless implantable bioelectronics provide powerful capabilities for biotelemetry, therapeutics, and neural interfacing. These technologies rely on antennas to communicate with external receivers, yet existing systems suffer from poor radiation ...

IEEE2019

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In article number 1903051, Matthieu Rüegg, Juergen Brugger, and co-workers design, fabricate, and characterize biodegradable magnesium microresonators using an innovative microfabrication process based on ion beam etching. Under a radio-frequency magnetic ...

2019

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Buoyancy driven flows such as gravity currents, present in nature and human made applications, are conveyors of particles or dissolved substances for long distances with clear implications for the environment. This transport depends on the triggering condi ...

2018

Permeance Based Modeling of Magnetic Hysteresis with Inclusion of Eddy Current Effect

Drazen Dujic, Min Luo, Jost Allmeling

Magnetic hysteresis together with eddy current effects are typically present in metal based core materials and contribute significantly to the nonlinearity and power loss of the magnetic components operating in power electronic converters. In order to inve ...

IEEE2018

The quench protection system of the nonplanar coils of the Wendelstein 7-X stellarator was laid out over 15 years ago. At that time, the assessment of the hot-spot temperature by a basic adiabatic model was done using design values for material and operati ...

2018

Magnesium partitioning between metal and silicate was experimentally investigated between 34 and 138GPa, 3,500 and 5,450K using laser-heated diamond anvil cells. The 22 measurements are combined with previously published data (total of 49 measurements) to ...

AMER GEOPHYSICAL UNION2018