témavezető: Bakonyi Imre
helyszín (magyar oldal): Wigner Research Centre for Phyics, Hungarian Academy of Sciences helyszín rövidítés: MTA
A kutatási téma leírása:
Our research group has been engaged for the last three decades in the electrochemical preparation and experimental study of metallic magnetic nanostructures including nanocrystalline (nc) ferromagnetic metals, thin magnetic films, magnetic/non-magnetic multilayer films and nanowires. The electrochemical technique provides a relatively simple opportunity to electrodeposit feromagnetic elements (Ni, Co and Fe) in nanocrystalline state with grain sizes down to 10 nm grain size range. The PhD work includes the electrochemical preparation of these nc ferromagnetic metals and eventually some of their alloys, their structural characterization by electron microscopy and X-ray diffraction, as well as studying their magnetic and transport properties. The electrodeposition laboratory for sample preparation and the facilities for measuring the magnetic and magnetotransport properties are available in our laboratory at the Wigner RCP. The facilities for structural studies are available via collaborating partners (XRD: ELTE; TEM: another campus institute). The major interest currently lies in the investigation of the anisotropic magnetoresistance (AMR) of the above listed pure ferromagnetic metals in oder to get infomation on how the small grain size influences the magnitude of the AMR in comparison with the bulk (large-grained, well annealed and defect free) state of the same metal. Our magnetotransport facility also offers the measurement of the magnetoresistance from 300 K down to about 15 K which provides then interesting insight into the transport properties since in this temperature range the electron mean free path changes by at least two orders of magnitude due to the suppression of the electron-phonon interaction at low temperatures.
előírt nyelvtudás: English további elvárások: MSc in Physics/Engineering Physics, basic knowledge of measurement techniques, some expertise in structural studies, data acquisition and evaluation; programming expertise is advantageous
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