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Stefano Rusponi

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Related publications (60)

X-Treme beamline at SLS: X-ray magnetic circular and linear dichroism at high field and low temperature

Harald Brune, Stefano Rusponi, Thomas Schmidt, Jan Gui-Hyon Dreiser

X-Treme is a soft X-ray beamline recently built in the Swiss Light Source at the Paul Scherrer Institut in collaboration with Ecole Polytechnique Federale de Lausanne. The beamline is dedicated to polarization-dependent X-ray absorption spectroscopy at hig ...

Wiley-Blackwell2012

Electronic states of moiré modulated Cu films

Harald Brune, Stefano Rusponi, Anne Lehnert

We examined by low-energy electron diffraction and scanning tunneling microscopy the surface of thin Cu films on Pt(111). The Cu/Pt lattice mismatch induces a moire modulation for films from 3 to about 10 ML thickness. We used angle-resolved photoemission ...

Iop Publishing Ltd2012

Self-Assembled Nanometer-Scale Magnetic Networks on Surfaces: Fundamental Interactions and Functional Properties

Harald Brune, Klaus Kern, Pietro Gambardella, Stefano Rusponi, Anne Lehnert, Sebastian Stepanow, Sergio Vlaic

Nanomagnets of controlled size, organized into regular patterns open new perspectives in the fields of nanoelectronics, spintronics, and quantum computation. Self-assembling processes on various types of substrates allow designing fine-structured architect ...

Wiley-Blackwell2011

Magnetocrystalline anisotropy energy of Co and Fe adatoms on the (111) surfaces of Pd and Rh

Harald Brune, Pietro Gambardella, Stefano Rusponi, Anne Lehnert, Géraud Moulas, Markus Etzkorn

We performed a combined theoretical and experimental investigation of the orbital magnetism and magnetocrystalline anisotropy of isolated Co and Fe adatoms on Pd(111) and Rh(111). Theoretical calculations of the spin and orbital moments are based on ab ini ...

2010

Magnetic anisotropy of Fe and Co adatoms and Fe clusters magnetically decoupled from Ni_{3}Al(111) by an alumina bilayer

Harald Brune, Stefano Rusponi, Anne Lehnert, Markus Etzkorn

The magnetic properties of individual Fe and Co atoms as well as of small Fe clusters adsorbed on two atomic layers of Al2O3 grown on Ni3Al(111) have been investigated by x-ray absorption spectroscopy and x-ray magnetic circular dichroism. We find ratios o ...

2010

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

Double-resonant x-ray and microwave absorption: Atomic spectroscopy of precessional orbital and spin dynamics

Giovanni Boero, Pietro Gambardella, Stefano Rusponi

We show that double-resonance spectra recorded during the simultaneous absorption of x-ray and microwave (MW) photons are a fingerprint of the perturbed electronic configuration of atomic species driven to ferromagnetic resonance. X-ray absorption measurem ...

2009

Longitudinal detection of ferromagnetic resonance using x-ray transmission measurements

Giovanni Boero, Pietro Gambardella, Stefano Rusponi

We describe a setup for the x-ray detection of ferromagnetic resonance in the longitudinal geometry using element-specific transmission measurements. Thin magnetic film samples are placed in a static magnetic field collinear with the propagation direction ...

American Institute of Physics2009

Role of hydrogen in giant spin polarization observed on magnetic nanostructures

Harald Brune, Stefano Rusponi

We demonstrate that the giant spin contrast observed by scanning tunneling microscopy for double-layer Coislands on Pt(111) is caused by adsorbates at the apex of the Cr-coated W tip. The most likely candidate, in ab initio simulations, is hydrogen. Here, ...

2008

Element-resolved x-ray ferrimagnetic and ferromagnetic resonance spectroscopy

Giovanni Boero, Pietro Gambardella, Stefano Rusponi, Schahrazede-Lila Mouaziz

Institute of Physics (IoP) and Deutsche Physikalische Gesellschaft2008

High magnetic moments and anisotropies for FexCo1 - x monolayers on Pt(111)

Harald Brune, Pietro Gambardella, Stefano Rusponi, Anne Lehnert, Géraud Moulas, Markus Etzkorn

2008

Surface characterization of MnxGe1-x and CryMnxGe1-x-y dilute magnetic semiconductors

Laurent Claude, Harald Brune, Pietro Gambardella, Stefano Rusponi

We have used x-ray photoemission electron microscopy (XPEEM) and x-ray absorption spectroscopy (XAS) to characterize MnxGe1-x and CryMnxGe1-x-y films grown by molecular beam epitaxy. The surface layers of the as-grown films probed by XPEEM present segregat ...

2007

Magnetic properties of 2D islands on single crystal metal surfaces

Harald Brune, Stefano Rusponi

2007

Magnetism of Fe clusters and islands on Pt surfaces

Harald Brune, Klaus Kern, Stefano Rusponi

Clusters and islands of Fe atoms have been prepared by noble gas buffer layer assisted growth as well as by standard molecular beam epitaxy on Pt substrates. Xe buffer layers have been utilized to promote the formation of compact, relaxed Fe clusters with ...

2006

Nucleation of ordered Fe islands on Al2O3/Ni3Al(111)

Harald Brune, Stefano Rusponi, Anne Lehnert, Régis Decker

Scanning tunneling microscopy (STM) has been used to investigate the nucleation and stability of iron clusters on the Al2O3/Ni3Al (111) surface as a function of coverage and annealing temperature. We show that atomic beam deposition of iron leads to hexago ...

2006

Structure and magnetism of atomically thin Fe layers on flat and vicinal Pt surfaces

Harald Brune, Klaus Kern, Pietro Gambardella, Stefano Rusponi, Violetta Sessi

Ultrathin Fe films on Pt substrates have been investigated under ultrahigh vacuum conditions by scanning tunneling microscopy, low energy electron diffraction, magneto-optical Kerr effect, x-ray magnetic circular dichroism measurements, and Kerr microscopy ...

2006

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

X-ray ferromagnetic resonance spectroscopy

Harald Brune, Radivoje Popovic, Giovanni Boero, Pietro Gambardella, Stefano Rusponi

We present a method to measure continuous-wave ferromagnetic resonance (FMR) spectra based on the core-level absorption of circularly polarized x rays. The technique is demonstrated by using a monochromatic x-ray beam incident on an yttrium-iron-garnet sam ...

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

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