Speaker
Description
Electrodeposition is an electrochemical technique used to synthesize nanostructured materials. By manipulating the experimental conditions (potential, current density, electrolyte composition, temperature, external magnetic field, etc.) it is possible to control the nucleation, growth, and assembly of the deposited material. This allows for fabrication of nanostructures with tailored dimensions, architectures and morphologies.
The application of an external magnetic field during electrodeposition introduces an additional degree of control over the process. The Lorentz force and Kelvin force, which act on the moving ions, within the electrolyte, can influence mass transport, convection, and even the nucleation and growth of the deposited structures.
Specifically, magnetic fields can alter the diffusion layer thickness, potentially enhancing or hindering ion transport to the electrode surface. Furthermore, magnetohydrodynamic effects can induce convective flows, which may impact the uniformity and morphology of the deposit.
In this work we investigated the effects of applying external magnetic field, during electrodeposition, on the magnetic properties of wires prepared from the Ni-Pt system. Samples with different geometries, including thin strips with various widths and a thin film, were prepared in varying orientations of the applied field. Their magnetic properties were measured via magnetic force microscopy and superconducting quantum interference device magnetometer. The results of these measurements were analyzed and compared to micromagnetic simulations.
Acknowledgements
Funded by the EU NextGenerationEU through the Recovery and Resilience Plan for Slovakia under the project No. 09I03-03-V05-00008 and the grant of the Slovak Research and Development Agency under the contract APVV-20-0324. S. Vorobiov acknowledges the financial support provided under the NextGenerationEU through the Recovery and Resilience Plan for Slovakia under project No. 09I03_03_V0400179.
