20.500.12556/RUL-150135 Vpliv kovinsko-organskega stika na magnetno anizotropijo tankih filmov kobalta Influence of metal-organic interface on the magnetic anisotropy in Co thin films Z ultrahitro časovno ločljivo optično spektroskopijo smo raziskovali vpliv stika kobalta z različnimi organskimi molekulskimi polprevodniki na magnetno anizotropijo v tankih filmih kobalta. Poleg vpliva molekul smo za primerjavo raziskovali tudi vpliv površinske oksidacije kobalta. Med vzorci z različnimi molekulami različnih oblik nismo opazili velikih razlik v obnašanju. Ugotovili smo, da so molekule povzročile močno povečanje magnetne anizotropije v ravnini filmov pod temperaturo $\sim$170 K. Prav tako se je povečala njena nehomogenost. V vzorcu s kobaltovim oksidom smo pod temperaturo $\sim$100 K prav tako opazili povečanje ravninske magnetne anizotropije, ki pa je bilo manjše kot v vzorcih z molekulami. By means of the ultrafast time-resolved optical spectroscopy we investigated the effect of different organic molecular semiconductors on the magnetic anisotropy of cobalt thin films as a consequence of forming a ferromagnetic-metal/organic-semiconductor spinterface. In addition to the molecules, the effect of natural cobalt surface oxidation was also investigated for comparison. We did not find large differences in the behavior of the samples containing molecules of different geometries. The molecules were found to significantly increase the in-plane magnetic anisotropy of the films below the temperature of $\sim$170 K. Additionally, the magnetic anisotropy inhomogeneity increased. The in-plane magnetic anisotropy also increased in the naturally oxidized sample below the temperature of $\sim$100 K. The increase was much smaller then in samples with organic molecules. ultrahitra časovno ločjiva optična spektroskopija tanki filmi kobalta magnetna anizotropija spinski stik organski polprevodniki ultrafast time-resolved optical spectroscopy cobalt thin films magnetic anisotropy spinterface organic semiconductors true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-09-14 08:15:12 2023-09-14 08:15:13 2023-09-16 03:20:50 0000-00-00 00:00:00 2023 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 135957 164348931 9585.pdf 9585.pdf 1 6DFC6B17ED2479A4A59591B51F8102F0 254fa0b20972924d73a393cd4ac4b3b2624ab627493cf98e5b49dad6abcf9f33 10f7284b-52c6-11ee-b233-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=174683 Fakulteta za matematiko in fiziko 0 0 0