Magnetism

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Magnonics, 3D magnetic nanostructures by FEBID/FIBID, Metamagnetic (FeRh) nanostructures, Magnetic vortices, Magnetic patterning by direct focused ion beam writing, ...

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Nanomagnetism and spintronics
Vojtěch Uhlíř Principal investigator
Jon Ander Arregi Postdoctoral researcher
Michal Staňo Postdoctoral researcher
Michal Horký Ph.D. student
Vojtěch Schánilec  Master student
Jiří Jaskowiec Master student
Lucie Motyčková ​Bachelor student
Václav Ondračka ​Bachelor student
Magnonics and 3D structures
Michal Urbánek Principal investigator
Meena Dhankhar Ph.D. student
Lukáš Flajšman Ph.D. student
Marek Vaňatka Ph.D. student
Igor Turčan Ph.D. student
Viola Křižáková Master student
Ondřej Wojewoda ​Bachelor student
   

Magnetic vortices

Magnetic vortices are curling magnetization structures formed in micro- and nanosized magnetic disks and polygons. They are known for having four different magnetization configurations (vortex states) that can be used for a multibit memory cell. We study dynamic magnetization processes of switching of the vortex states and we investigate the possibilities of writing two bits of information into a magnetic vortex.

For further details, contact Michal Urbánek (urbanek(at)fme.vutbr.cz).

Magnetic patterning by direct focused ion beam writing

Direct writing of magnetic patterns by focused-ion-beam irradiation presents a favorable alternative to the conventional lithography approaches. We study epitaxially grown metastable face-centered cubic (fcc) Fe thin films which undergo structural (fcc->bcc) and magnetic (paramagnetic->ferromagnetic) phase transformation upon ion-beam-irradiation. By using focused ion beam we were able to write ferromagnetic (bcc Fe) patterns into the paramagnetic (fcc Fe) layer with sub-100 nm resolution. Further, we can tune the spontaneous magnetization by cahnging ion dose and even anisotropy by changing the direction of rastering with focused ion beam.

For further details, contact Michal Urbánek (urbanek(at)fme.vutbr.cz).