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- W433477067 abstract "Hibrid magneses szerkezetek' c. palyazatunkban ket temakorben: (i) a magneses nanostrukturak ab initio szintű vizsgalataban es (ii) a magneses felvezetők valamint a kvantumszennyezők tanulmanyozasaban vegeztunk intenziv elmeleti kutatasokat: (i) Atomcsoportok es ultravekony filmek magneses szerkezetet hataroztuk meg, ravilagitva a Dzyaloshinskii-Moriya kolcsonhatas jelentősegere. A nagysűrűsegű magneses adattarolas szempontjabol meghatarozo magneses anizotropia kontroll-mechanizmusait vizsgaltuk vekonyretegekben. Kidolgoztuk a magneses anizotropia energia hőmersekletfuggesenek ab initio elmeletet. Reszletesen tanulmanyoztuk az aram altal hajtott spinatfordulas jelenseget es a magneto-optikai Kerr effektust; (ii) Ramutattunk a nem-kollinearis allapotok kialakulasara GaMnAs hig magneses felvezetőben es skalaelmeletet dolgoztunk ki a magnetotranszport leirasara. Uj mechanizmust javasoltunk egy Kondo szennyező feluleti magneses anizotropiajara. Reszletesen vizsgaltuk a spin szennyezesek elektron koherenciara gyakorolt hatasat, a spinek relaxaciojat es a kvantum dot rendszerek dinamikajat. Palyazatunk elsősorban az alapkutatasba sorolhato, bar a nanomagnesseg es spintronika teruleten tobb alkalmazas orientalt eredmenyunk szuletett (pl. komplex vekonyretegek magneses anizotropiaja, aram altal hajtott spinatfordulas, magnetotranszport magneses felvezetőkben). | In our research project entitled 'Hybrid magnetic structures' we performed intensive theoretical research on (i) magnetic nanostructures and (ii) on magnetic semiconductors and quantum impurities: (i) By highlighting the role of the Dzyaloshinskii-Moriya interactions, we determined the magnetic structure of small atomic clusters and ultrathin films. We carefully investigated the control of magnetic anisotropy that is of primary importance for high-density magnetic recording. We developed a first principles theory for the temperature dependence of the magnetic anisotropy energy. We also studied the phenomena of current driven magnetization switching and magneto-optical Kerr effect; (ii) We pointed out the formation of non-collinear states in GaMnAs magnetic semiconductor and developed a scaling theory for the description of magnetotransport. We proposed a novel mechanism for the surface magnetic anisotropy of Kondo impurities. We performed detailed studies on the effect of spin-impurities to electron coherence, on the relaxation spins and the dynamics of quantum dot systems. Although the results of our project mainly concern fundamental research, some of them, such as the magnetic anisotropy of ultrathin films, current induced spin-switching, magnetotransport in magnetic semiconductors, might be useful for applications in nanomagnetism and spintronics." @default.
- W433477067 created "2016-06-24" @default.
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- W433477067 date "2009-01-01" @default.
- W433477067 modified "2023-09-27" @default.
- W433477067 title "Hibrid mágneses szerkezetek = Hybrid magnetic structures" @default.
- W433477067 hasPublicationYear "2009" @default.
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