Magnetization Reversal of Ferromagnetic CoFeB Films and CoFeB/Ta/CoFeB Heterostructures in the Stray Field of Fe/Fe3O4 Nanoparticles

Autor:	R. S. Allayarov, O. V. Koplak, Stéphane Mangin, N. V. Granovskii, R. B. Morgunov, E. I. Kunitsyna
Rok vydání:	2020
Předmět:	Materials science Condensed matter physics Magnetic moment Demagnetizing field General Physics and Astronomy Nanoparticle Heterojunction 01 natural sciences Magnetic field Condensed Matter::Materials Science Magnetization Ferromagnetism 0103 physical sciences Magnetic force microscope 010306 general physics
Zdroj:	Journal of Experimental and Theoretical Physics. 131:607-617
ISSN:	1090-6509 1063-7761
Popis:	The magnetization reversal of the MgO/CoFeB/Ta/CoFeB/MgO/Ta/GaAs heterostructures and the ultrathin MgO/CoFeB/MgO/Ta/GaAs films with a perpendicular anisotropy in the magnetic field of clusters of Fe/Fe3O4 nanoparticles is experimentally observed. The stray magnetic field of Fe/Fe3O4 nanoparticles increases the field of switching the magnetization of spin valves and monolayer platforms. The size of the magnetization reversal region of the ferromagnetic platform under Fe/Fe3O4 nanoparticles as a function of the cluster size was determined by atomic force and magnetic force microscopy. The size of the magnetization reversal region is found to be larger than the particle cluster size, which is caused by the stray field of a cluster of Fe/Fe3O4 nanoparticles. The local magnetization orientations in the CoFeB layers under clusters of nanoparticles and the magnetization reversal region diameter are determined as functions of the magnetic moment and the size of the cluster using micromagnetic simulation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2bba3b9e9c1b1aaee29d6e6a40338012 https://doi.org/10.1134/s1063776120090046 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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