Sievers, Niklas

[["dc.bibliographiccitation.artnumber","08S504"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Journal of Applied Physics"],["dc.bibliographiccitation.volume","99"],["dc.contributor.author","Sievers, S."],["dc.contributor.author","Albrecht, M."],["dc.contributor.author","Siegner, Uwe"],["dc.contributor.author","Dreyer, S."],["dc.contributor.author","Jooss, C."],["dc.date.accessioned","2018-11-07T09:58:51Z"],["dc.date.available","2018-11-07T09:58:51Z"],["dc.date.issued","2006"],["dc.description.abstract","Combined magneto-optic indicator film (MOIF) and magnetic force microscopy (MFM) is introduced as an advanced tool for the characterization of patterned ferromagnetic films. The MOIF technique combines quantitative stray field imaging of individual micron-sized magnetic elements with a large-area overview of the patterned film while MFM provides nanometer spatial resolution. In order to demonstrate the potential of this approach, lithographically patterned CoPt films with out-of-plane anisotropy were characterized. The large-scale MOIF images reveal variations of the magnetization state and the magnetization reversal among individual magnetic elements. Corresponding high-resolution MFM images relate these results to the micromagnetic configuration of the elements. (C) 2006 American Institute of Physics."],["dc.identifier.doi","10.1063/1.2172538"],["dc.identifier.isi","000237404200785"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37457"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.relation.issn","0021-8979"],["dc.title","Combined optical and force microscopy of patterned magnetic films"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","09F518"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Journal of Applied Physics"],["dc.bibliographiccitation.volume","101"],["dc.contributor.author","Norpoth, J."],["dc.contributor.author","Dreyer, S."],["dc.contributor.author","Jooss, Ch."],["dc.contributor.author","Sievers, S."],["dc.date.accessioned","2018-11-07T11:02:44Z"],["dc.date.available","2018-11-07T11:02:44Z"],["dc.date.issued","2007"],["dc.description.abstract","The high magnetocrystalline anisotropy energy in hard magnetic materials may sustain magnetization distributions in the remanent state, which exhibit a high number of magnetic surface charges and thus significant magnetic stray fields. Here, we focus onto the stray field distribution in the exterior and the demagnetization field distribution in the interior of hard magnetic FePt elements without and with artificial saw tooth edge roughness. Our experiments and calculations reveal that external stray fields and internal demagnetization fields are considerably modified by the artificial edge roughness."],["dc.identifier.doi","10.1063/1.2712526"],["dc.identifier.isi","000246567900261"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/51456"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.publisher.place","Melville"],["dc.relation.conference","10th Joint Magnetism and Magnetic Materials Conference/International Magnetics Conference"],["dc.relation.eventlocation","Baltimore, MD"],["dc.relation.issn","0021-8979"],["dc.title","Manipulating the dipolar magnetic interactions in FePt square arrays: The role of edge roughness"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","042506"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Applied Physics Letters"],["dc.bibliographiccitation.volume","90"],["dc.contributor.author","Schnittger, S."],["dc.contributor.author","Dreyer, S."],["dc.contributor.author","Jooss, Ch."],["dc.contributor.author","Sievers, S."],["dc.contributor.author","Siegner, Uwe"],["dc.date.accessioned","2018-11-07T11:05:41Z"],["dc.date.available","2018-11-07T11:05:41Z"],["dc.date.issued","2007"],["dc.description.abstract","In order to study magnetostatic interactions in magnetic arrays, a two-dimensional pattern of hard magnetic (001) L1(0) CoPt squares embedded into a permalloy matrix was fabricated. The structural and magnetic properties of these arrays were characterized by magneto-optical measurements, atomic force and magnetic force microscopies. The hard magnetic squares are not exchange coupled to the soft magnet, yet a magnetostatic coupling was observed. This coupling modifies the domain structure of the permalloy matrix. In periodic arrays of embedded CoPt squares, the stray field interaction induces a long-range ordered domain pattern in the soft magnetic matrix and short-range correlations of edge domains in adjacent CoPt squares. (c) 2007 American Institute of Physics."],["dc.identifier.doi","10.1063/1.2435592"],["dc.identifier.isi","000243789600056"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/52123"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0003-6951"],["dc.relation.orgunit","Institut für Materialphysik"],["dc.title","Magnetostatic interactions in patterned CoPt films embedded in a permalloy matrix"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]