Publications by Nicolas Weiss | EPFL Graph Search

CORTEX experiments – Part I: Modulation campaigns in AKR-2 & CROCUS for the validation of neutron noise codes

Nicolas Weiss, Daniel Godat, Pavel Frajtag, Andreas Pautz, Adolfo Rais, Oskari Ville Pakari, Vincent Pierre Lamirand, Mathieu Hursin, Fanny Vitullo, Thomas Jean-François Ligonnet, Axel Guy Marie Laureau

We present the experimental campaigns – namely, three per facility – carried out between 2018 and 2021 in the AKR–2 and CROCUS zero power reactors within the framework of the Horizon 2020 European project CORTEX. Their purpose was to produce high-quality a ...

2025

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

Nicolas Weiss, Harald Brune, François Patthey, 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

High resolution in situ magneto-optic Kerr effect and scanning tunneling microscopy setup with all optical components in UHV

Philipp Buluschek, Nicolas Weiss, Harald Brune, Stefano Rusponi, Matthias Treier, Anne Lehnert

A surface magneto-optic Kerr effect (MOKE) setup fully integrated in an ultrahigh vacuum chamber is presented. The system has been designed to combine in situ MOKE and scanning tunneling microscopy. Magnetic fields up to 0.3 T can be applied at any angle i ...

2009

High tunnel magnetoresistance in spin-polarized scanning tunneling microscopy of Co nanoparticles on Pt(111)

Nicolas Weiss, Harald Brune, Stefano Rusponi

We employ variable-temperature spin-polarized scanning tunneling microscopy in constant current mode to read the magnetic state of monodomain cobalt nanoparticles on Pt(111). In order to avoid stray fields we use in situ prepared antiferromagnetically (Cr) ...

2005

Uniform magnetic properties for an ultrahigh-density lattice of noninteracting Co nanostructures

Nicolas Weiss, Harald Brune, Stefano Rusponi

We report on the magnetic properties of two-dimensional Co nanoparticles arranged in macroscopically phase-coherent superlattices created by self-assembly on Au(788). Our particles have a density of 26 Tera/in(2) (1 Tera=10(12)), are monodomain, and have u ...

2005

Magnetic anisotropy from single atoms to large monodomain islands of Co/]Pt(111)

Nicolas Weiss, Harald Brune, Pietro Gambardella, Stefano Rusponi

By studying the magnetic behavior of self-assembled Co islands on a single-crystal metal surface, Pt(111), we show how the magnetic anisotropy evolves from isolated atoms to monolayer islands and films. Single Co adatoms are found to have a giant magnetocr ...

2005

Nicolas Weiss

CORTEX experiments – Part I: Modulation campaigns in AKR-2 &amp; CROCUS for the validation of neutron noise codes

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

High resolution in situ magneto-optic Kerr effect and scanning tunneling microscopy setup with all optical components in UHV

High tunnel magnetoresistance in spin-polarized scanning tunneling microscopy of Co nanoparticles on Pt(111)

Uniform magnetic properties for an ultrahigh-density lattice of noninteracting Co nanostructures

Magnetic anisotropy from single atoms to large monodomain islands of Co/]Pt(111)

CORTEX experiments – Part I: Modulation campaigns in AKR-2 & CROCUS for the validation of neutron noise codes