Outcomes

the latest outcomes

Publications view all
from our users
APL Materials 10, 091115 (2022)
Dynamic coupling and spin-wave dispersions in a magnetic hybrid system made of an artificial spin-ice structure and an extended NiFe underlayer
Read Abstract
We present a combined experimental and numerical study of the spin-wave dispersion in a NiFe artificial spin-ice (ASI) system consisting of an array of stadium-shaped nanoislands deposited on the top of a continuous NiFe film with non-magnetic spacer layers of varying thickness. The spin-wave dispersion, measured by wavevector resolved Brillouin light scattering spectroscopy in the Damon–Eshbach configuration, consists of a rich number of modes, with either stationary or propagating character. We find that the lowest frequency mode displays a bandwidth of ∼0.5 GHz, which is independent of the presence of the film underneath. On the contrary, the Brillouin light scattering intensity of some of the detected modes strongly depends on the presence of the extended thin-film underlayer. Micromagnetic simulations unveil the details of the dynamic coupling between the ASI lattice and film underlayer. Interestingly, the ASI lattice facilitates dynamics of the film either specific wavelengths or intensity modulation peculiar to the modes of the ASI elements imprinted in the film. Our results demonstrate that propagating spin waves can be modulated at the nanometer length scale by harnessing the dynamic mode coupling in the vertical, i.e., the out-of-plane direction of suitably designed magnonic structures.
Link to publication
from our users
Applied Surface Science, 605, 154883 (2022)
Effect of the crystallographic c-axis orientation on the tribological properties of the few-layer PtSe2
Read Abstract
Two-dimensional (2D) transition metal dichalcogenides are potential candidates for ultrathin solid-state lubricants in low-dimensional systems owing to their flatness, high in-plane mechanical strength, and low shear interlayer strength. Yet, the effects of surface topography and surface chemistry on the tribological properties of 2D layers are still unclear. In this work, we performed a comparative investigation of nanoscale tribological properties of ultra-thin highly-ordered PtSe2 layers deposited on the sapphire substrates with the in-plane and out-of-plane crystallographic orientation of the PtSe2 c-axis flakes, and epitaxial PtSe2 layers. PtSe2 c-axis orientation was found to has an impact on the nanotribological, morphological and electrical properties of PtSe2, in particular the change in the alignment of the PtSe2 flakes from vertical (VA) to horizontal (HA) led to the lowering of the coefficient of friction from 0.21 to 0.16. This observation was accompanied by an increase in the root-mean-square surface roughness from 1.0 to 1.7 nm for the HA and VA films, respectively. The epitaxial films showed lower friction caused by lowering adhesion when compared to other investigated films, whereas the friction coefficient was similar to films with HA flakes. The observed trends in nanoscale friction is attributed to a different distribution of PtSe2 structure.
Link to publication
from our users
Front. Physiol. 13:979298
Biomechanical properties of native and cultured red blood cells-Interplay of shape, structure and biomechanics
Read Abstract
Modern medicine increases the demand for safe blood products. Ex vivo cultured red blood cells (cRBC) are eagerly awaited as a standardized, safe source of RBC. Established culture models still lack the terminal cytoskeletal remodeling from reticulocyte to erythrocyte with changes in the biomechanical properties and interacts with membrane stiffness, viscosity of the cytoplasm and the cytoskeletal network. Comprehensive data on the biomechanical properties of cRBC are needed to take the last step towards translation into clinical use in transfusion medicine. Aim of the study was the comparative analysis of topographical and biomechanical properties of cRBC, generated from human CD34(+) adult hematopoietic stem/progenitor cells, with native reticulocytes (nRET) and erythrocytes (nRBC) using cell biological and biomechanical technologies. To gain the desired all-encompassing information, a single method was unsatisfactory and only the combination of different methods could lead to the goal. Topographical information was matched with biomechanical data from optical tweezers (OT), atomic force microscopy (AFM) and digital holographic microscopy (DHM). Underlying structures were investigated in detail. Imaging, deformability and recovery time showed a high similarity between cRBC and nRBC. Young's modulus and plasticity index also confirmed this similarity. No significant differences in membrane and cytoskeletal proteins were found, while lipid deficiency resulted in spherical, vesiculated cells with impaired biomechanical functionality. The combination of techniques has proven successful and experiments underscore a close relationship between lipid content, shape and biomechanical functionality of RBC.
Link to publication
Deliverables view all
WP1 - MGT1 - Project Management
D1.4 - First gender report
Read Abstract
Under Horizon 2020 gender is a cross-cutting issue and 3 objectives underpin the strategy on gender equality: 1. Fostering gender balance in research teams, in order to close the gaps in the participation of women. 2. Ensuring gender balance in decision-making, in order to reach the target of 40% of the under-represented sex in panels and groups and of 50% in advisory groups. 3. Integrating the gender dimension in research and innovation (R&I) content. In Horizon 2020 funded projects grant beneficiaries commit themselves to promoting equal opportunities and a balanced participation of women and men at all levels in research and innovation teams and in management structures. Moreover, gender balance is a feature of H2020 projects evaluated under Impact. This document aims at having a detailed snapshot of NEP performances about gender in the first 18 months from the beginning of the project, also in comparison with the numbers presented in SHE FIGURES 2021 (https://ec.europa.eu/assets/rtd/shefigures2021/index.html), and at identifying actions to pursue to better address gender issues outlined in NEP proposals.
Download full report
WP11 - JA1 - Real-time observation and control in microscopy and spectroscopy of nanoobjects
D11.2 - Pilot experiment carried out in collaboration with a FEL user facility
Read Abstract
The recent development of Free Electron Lasers (FELs) opens the way for pump-probe experiments in the extreme ultra violet (EUV) and X-Rays regime. In particular, seeded FELs are the best candidates for experiments in which high wavelength purity and power stability is required, such as coherent non-linear experiments. In this case, the fine control of photon energy and polarization is the key for accessing the dynamics of core level electrons in solid state systems, thanks to the species selectivity given by the variable photon energy of FEL pulses.
Download full report
WP15 - JA1 - Real-time observation and control in microscopy and spectroscopy of nanoobjects
D11.5 - Determination of the DMI constant by four-wave mixing FWM experiments based on a table top laser
Read Abstract
During the first year of NEP project a new setup for Four-Wave-Mixing (FWM) experiment was under development and implementation. Due to some problems with the laser amplifier and oscillator, the experiment was stopped for almost one year. Knowing the long time generally required for repairing this systems, we decide to implement the setup using a different type of laser, which furnishes pulses with 300 fs time length, a repetition rate of 100 kHz, and 400 uJ/pulse at 1030 nm. The main scope of this deliverable is demonstrating if it is possible to measure magnetic properties with a FWM approach, and comparing it with well-known technique for magnetic measurements.
Download full report
Transnational Access Statistics
18 calls for access
617 proposals submitted
64% rate of acceptance
31% with Large Scale Facilities
12% with theory
12% with industry
~3 average users per proposal
58 countries applying
1840 lab sessions