9 papers
Mapping Reversal Pathways and Interaction Fields in Artificial Spin Ice
Brindaban Ojha, MatÃas P. Grassi, Vassilios Kapaklis
In artificial spin ice (ASI), magnetic interactions between nanomagnets determine both the stable states and the switching pathways under an applied field. Here, first-order revers…
Long-Range Magnetic Order in Structurally Embedded Mesospin Metamaterials
Christina Vantaraki, Oier Bikondoa, MatÃas P. Grassi +11
Engineered assemblies of interacting magnetic elements-magnetic metamaterials-provide a powerful route to tailor collective magnetic order and dynamics. By structuring matter at th…
GenL: An extensible fitting program for Laue oscillations and whole pattern fitting
Anna L. Ravensburg, Johan Bylin, Vassilios Kapaklis +1
GenL is a flexible program that can be used to simulate and/or fit X-ray reflectivity and X-ray diffraction data from epitaxial thin films exhibiting, for example, Laue oscillation…
Quantitative measurement of magnetic dichroic signals at sub-nanometer to atomic scale resolution conditions
Sharath Kumar Manjeshwar Sathyanath, Anna L. Ravensburg, Vassilios Kapaklis +3
When aiming for atomic resolution electron magnetic circular dichroism (EMCD) in STEM mode, the high convergence angle of the electron probe can lead to unforeseen artefacts and st…
Magnetic texture control in ion-implanted metamaterials
Christina Vantaraki, Kristina Ignatova, Dmitrii Moldarev +5
We study experimentally the impact of the additive fabrication method on the magnetic properties of Fe-implanted Pd square artificial spin ice lattices. Our findings show that…
Exponential Dependence of Interlayer Exchange Coupling in Fe/MgO(001) Superlattices on Temperature
Nanny Strandqvist, Tobias Warnatz, Kristbjörg Anna Thórarinsdóttir +3
The interlayer exchange coupling in Fe/MgO(001) superlattices is found to increase exponentially with decreasing temperature. Around 150~K, the field induced response changes from…