Concept

Magnétomètre

Publications associées (432)

On the Dynamics of Magnetic Swimmers in Stokes Flow

In the past decade, the engineering community has conceived, manufactured and tested micro-swimmers, i.e. microscopic devices which can be steered in their intended environment. Foreseen applications range from microsurgery and targeted drug delivery to en ...

EPFL2019

Thermodynamic Signatures of Weyl Fermions in NbP

Philip Johannes Walter Moll

We present a high magnetic field study of NbP—a member of the monopnictide Weyl semimetal (WSM) family. While the monoarsenides (NbAs and TaAs) have topologically distinct left and right-handed Weyl fermi surfaces, NbP is argued to be “topologically trivia ...

2019

Mechanical spectroscopy as an in situ tool to study first and second order transitions in metastable Fe-Ga alloys

Daniele Mari

Phase transitions and related anelastic effects are examined in Fe-xGa alloys (x =19 and 27 at.%) by means of in situ neutron diffraction, vibrating sample magnetometry, dilatometry, and three different mechanical spectroscopy techniques: torsion forced pe ...

ELSEVIER SCIENCE SA2019

Upgrade of a low-temperature scanning tunneling microscope for electron-spin resonance

Harald Brune, François Patthey, Nicolas Weiss, Donat Fabian Natterer, Tobias Bilgeri, Patrick Robert Forrester

Electron spin resonance with a scanning tunneling microscope (ESR-STM) combines the high energy resolution of spin resonance spectroscopy with the atomic scale control and spatial resolution of STM. Here we describe the upgrade of a helium-3 STM with a 2D ...

AMER INST PHYSICS2019

Photo-physical Properties of Perovskites on Curved Surfaces

Konstantins Mantulnikovs

Organic-inorganic metal halide perovskites (MHPs) have recently attracted increasing attention as highly-efficient light-harvesting materials for photovoltaic applications. The technical ease of solution processing of these materials is one of their major ...

EPFL2019

Magnetic and structural properties of Ni-substituted magnetoelectric Co4Nb2O9

Henrik Moodysson Rønnow, Ivica Zivkovic, Virgile Yves Favre, Hadi Papi, Hossein Ahmadvand

The magnetic and structural properties of polycrystalline Co4-xNixNb2O9 (x = 1, 2) have been investigated by neutron powder diffraction, magnetization and heat capacity measurements, and density functional theory (DFT) calculations. For x = 1, the compound ...

2019

Field- and temperature-modulated spin diode effect in a GMR nanowire with dipolar coupling

Jean-Philippe Ansermet, Francesco Antonio Vetrò

The magnetization dynamics of single Co/Cu/Co spin valves, embedded in electrodeposited nanowires of 30 nm avarage diameter, was observed using the spin-diode effect. The electrically-detected magnetic resonances were compared when using modulation of eith ...

IOP PUBLISHING LTD2019

1200 V Multi-Channel Power Devices with 2.8 Ω•mm ON-Resistance

Elison de Nazareth Matioli, Jun Ma, Catherine Erine, Minghua Zhu, Kai Cheng

Here we report novel multi-channel AlGaN/GaN MOSHEMTs with high breakdown voltage (V BR ) and low ON-resistance (R ON ). The multi-channel structure was judiciously designed to yield a small sheet resistance (R s ) of 80 Ω/sq using only four 2DEG channels, ...

IEEE2019

1200 V Multi-Channel Power Devices with 2.8 Omega.mm ON-Resistance

Elison de Nazareth Matioli, Jun Ma, Catherine Erine, Minghua Zhu, Kai Cheng

Here we report novel multi-channel AlGaN/GaN MOSHEMTs with high breakdown voltage (V-BR) and low ON-resistance (R-ON). The multi-channel structure was judiciously designed to yield a small sheet resistance (R-s) of 80 Omega/sq using only four 2DEG channels ...

IEEE2019

Nonuniform Spin-Wave Softening in Two-Dimensional Magnonic Crystals as a Tool for Opening Omnidirectional Magnonic Band Gaps

Dirk Grundler

By means of the plane-wave method we study spin-wave dynamics in two-dimensional bicomponent magnonic crystals based on a squeezed hexagonal lattice and consist of a permalloy thin film with cobalt inclusions. We explore the dependence of a spin-wave frequ ...

2019

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