
Mieszko KołodziejAdam Mickiewicz University in Poznań | UAM · NanoBioMedical Centre
Mieszko Kołodziej
PhD
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Publications (7)
Flexoelectricity, an intrinsic property observed in materials under nonuniform deformation, entails a coupling between polarization and strain gradients. Recent catalyst advancements have reignited interest in flexoelectricity, particularly at the nanoscale, where pronounced strain gradients promote robust flexoelectric effects. This paper comprehe...
Iron-based compounds with a ThMn12-type structure have the potential to bridge the gap between ferrites and high performance Nd2Fe14B magnets. From the point of view of possible applications, the main advantage is their composition, with about 10 wt.% less rare earth elements in comparison with the 2:14:1 phase. On the other hand, the main issue de...
The alloys that crystallize in a tetragonal ThMn12-type (space group I4/mmm) structure and are based on Fe and rare earth elements are believed to have a potential to plug the performance gap between ferrite and Nd-based magnets. Nevertheless, the progress is hindered by their poor structural stability, compared with other phases competing during t...
FeNi-based alloys are known to crystallize in bcc or fcc-structures depending on their composition. In many slowly cooled objects, like meteorites, L10-type phase (tetrataenite) with its characteristic layered Fe/Ni structure has been found. Nevertheless, the synthesis of L10 FeNi phase in industrial amount in a bulk form has not been possible, mai...
(Fe,Co)2B-based compounds with specific 5d substitutions are considered as promising materials for permanent magnets without rare-earth elements. We conducted a combined first-principles and experimental study focused on (Fe0.7Co0.3)2B alloys doped with W and Re. First, we used full-potential local-orbital scheme to systematically investigate (Fe,C...
A magnetocaloric effect with wide tunability was observed in melt-spun amorphous Gd 65 Fe 15-x Co 5+x Al 10 Si 5 ( x = 0, 5, 10) alloys of different Fe/Co ratios. Their magnetic properties were compared with those of the previously investigated parent alloy Gd 65 Fe 10 Co 10 Al 15 . The glassy structure of the melt-spun samples was confirmed by X-r...
In this work we investigated FeNi-based alloys synthesized from the cosmic matter of Morasko Meteorite (MM). The fall of Morasko iron meteorite is one of the biggest known in Central Europe and it has been dated to take place about five thousand years ago. It is known that iron meteorites contain hard magnetic tetrataenite phase (L10 FeNi), which h...