W. Marciniak

Combining Frozen Trajectory Excitation and TACAW for in silico Time-Resolved Vibrational Electron Energy Loss/Gain Spectroscopy

W. Marciniak, Joanna Marciniak, José Ángel Castellanos-Reyes, Ján Rusz

Seeing that ultrafast (picosecond timescale) vibrational electron energy loss spectroscopy (EELS) should soon be experimentally realizable, we present in silico approach capable of providing insight from the computational physics perspective. We present a framework that combines frozen trajectory excitation (FTE) with time …

se, pl (code pays fourni par la source)

Combining Frozen Trajectory Excitation and TACAW for in silico Time-Resolved Vibrational Electron Energy Loss/Gain Spectroscopy

W. Marciniak, Joanna Marciniak, José Ángel Castellanos-Reyes, Ján Rusz

Seeing that ultrafast (picosecond timescale) vibrational electron energy loss spectroscopy (EELS) should soon be experimentally realizable, we present in silico approach capable of providing insight from the computational physics perspective. We present a framework that combines frozen trajectory excitation (FTE) with time …

se, pl (code pays fourni par la source)

Mode-dependent phonon relaxation in time-resolved electron diffraction pattern simulations

W. Marciniak, Joanna Marciniak, José Ángel Castellanos-Reyes, Ján Rusz

Time-resolved pump-probe experiments offer unique possibilities for studying ultrafast processes; however, simulation tools for interpreting phonon dynamics in electron diffraction patterns at the sub-picosecond scale remain limited. We introduce the frozen-trajectory excitation (FTE) method of exciting phonons beyond their thermal equilibrium population …

pl, se (code pays fourni par la source)

Giant magnetocrystalline anisotropy energy in Fe--Co alloy under uniaxial compression: first-principles prediction

W. Marciniak, Joanna Marciniak, José Ángel Castellanos-Reyes, Mirosław Werwiński

Uniaxially strained Fe--Co disordered alloys have emerged as promising candidates for cost-effective rare-earth-free permanent magnets due to their high magnetocrystalline anisotropy energy (MAE). Using first-principles, fully relativistic calculations within the coherent potential approximation and PBE exchange-correlation potential, we explore the MAE of …

Structural and Magnetic Properties of Ultrathin Films Calculated from First-Principles

Justyna Natalia Rychły-Gruszecka, Joanna Marciniak, Justyn Snarski-Adamski, J. Meixner et autres

Ultra-thin magnetic films, ranging in thickness from a single atomic monolayer to several dozen atomic layers, show a variety of structural and magnetic properties that distinguish them from thicker films and bulk materials. In this work, we summarize the results obtained for …

pl, se (code pays fourni par la source)

Structural and magnetic properties of Fe-Co-C alloys with tetragonal deformation: A first-principles study

W. Marciniak, Mirosław Werwiński

Fe-Co alloys with induced tetragonal strain are promising materials for rare-earth-free permanent magnets. However, as ultrathin-film studies have shown, tetragonal Fe-Co structures tend to a rapid relaxation toward a cubic structure as the thickness of the deposited film increases. One of the …

pl (code pays fourni par la source)

Analysis of fast prototyping of microcontroller-based ML software for acoustic signal classification

Filip Marciniak, W. Marciniak, Tomasz Marciniak

The paper analyzes the preparation of software for acoustic signal classification with machine learning techniques for microcontrollers. The design process was tested for three types of devices: Nordic Thingy:53, SensorTile.box and Arduino Nano 33 BLE Sense Lite. The classifier training process was …

pl (code pays fourni par la source)

Structural and magnetic properties of Fe-Co-C alloys with tetragonal deformation: a first-principle study

W. Marciniak, Mirosław Werwiński

Fe-Co alloys with induced tetragonal strain are promising materials for rare-earth-free permanent magnets. However, as ultrathin-film studies have shown, tetragonal Fe-Co structures tend to a rapid relaxation toward a cubic structure as the thickness of the deposited film increases. One of the …

pl (code pays fourni par la source)

Structural transformation and magnetic properties of (Fe0.7Co0.3)2B alloys doped with 5d elements: A combined first-principles and experimental study

A. Musiał, W. Marciniak, Z. Śniadecki, Mirosław Werwiński et autres

pl, sk (code pays fourni par la source)

DFT calculation of intrinsic properties of magnetically hard phase L1 0 FePt

Joanna Marciniak, W. Marciniak, Mirosław Werwiński

pl (code pays fourni par la source)

Electronic structure of YbFe4Al8 antiferromagnet: A combined X-ray photoelectron spectroscopy and first-principles study

W. Marciniak, G. Chełkowska, A. Bajorek, A. Kowałczyk et autres

pl (code pays fourni par la source)

Curie temperature study of Y ( F e 1 − x C o x ) 2 and Z r ( F e 1 − x C o x ) 2 systems using mean field theory and Monte Carlo method

Bartosz Wasilewski, W. Marciniak, Mirosław Werwiński

Abstract Cubic Laves phases including , , , and are considered as promising candidates for application in hydrogen storage and magnetic refrigeration. While and are ferromagnets, alloying with Co decreases magnetic moments and Curie temperatures ( T C ) of pseudobinary and …

pl (code pays fourni par la source)