Sievers, Niklas

[["dc.bibliographiccitation.artnumber","10J308"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Journal of Applied Physics"],["dc.bibliographiccitation.volume","97"],["dc.contributor.author","Sievers, S."],["dc.contributor.author","Albrecht, M."],["dc.contributor.author","Siegner, Uwe"],["dc.contributor.author","Herweg, C."],["dc.contributor.author","Freyhardt, Herbert C."],["dc.date.accessioned","2018-11-07T11:00:34Z"],["dc.date.available","2018-11-07T11:00:34Z"],["dc.date.issued","2005"],["dc.description.abstract","We present atomic and magnetic force microscopy measurements on magnetic iron nanoparticles produced by a self-assembly method. The fabrication process is based on the thermal disintegration of iron nanowires deposited on faceted Al2O3 Substrates. Arrangement and size of the particles depend on the annealing temperature. For iron this process yields particles with diameters in the range of 100-250 nm. The usage of the prepatterned substrates enforces a linear alignment of the particles. Magnetic force microscopy shows that the particles can be remanently magnetized with external fields of different orientations. (c) 2005 American Institute of Physics."],["dc.identifier.doi","10.1063/1.1851927"],["dc.identifier.isi","000230168500046"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/50948"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Inst Physics"],["dc.publisher.place","Melville"],["dc.relation.conference","49th Annual Conference on Magnetism and Magnetic Materials"],["dc.relation.eventlocation","Jacksonville, FL"],["dc.relation.issn","0021-8979"],["dc.title","Self-ordered growth and magnetic force microscopy study of iron nanoparticles"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","125609"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Nanotechnology"],["dc.bibliographiccitation.volume","18"],["dc.contributor.author","Schlenker, E."],["dc.contributor.author","Bakin, A."],["dc.contributor.author","Schmid, H."],["dc.contributor.author","Madhok, Vishnu B."],["dc.contributor.author","Sievers, S."],["dc.contributor.author","Albrecht, M."],["dc.contributor.author","Ronning, Carsten"],["dc.contributor.author","Mueller, S."],["dc.contributor.author","Al-Suleiman, M."],["dc.contributor.author","Postels, B."],["dc.contributor.author","Wehmann, H-H"],["dc.contributor.author","Siegner, Uwe"],["dc.contributor.author","Waag, Andreas"],["dc.date.accessioned","2018-11-07T11:04:03Z"],["dc.date.available","2018-11-07T11:04:03Z"],["dc.date.issued","2007"],["dc.description.abstract","ZnO nanorods were grown on Si substrates by an aqueous chemical approach and subsequently doped by V implantation. Transmission electron microscopy and photoluminescence spectroscopy reveal a severely defective material directly after the implantation process. Subsequent annealing leads to a partial recovery of the crystal structure. The magnetic features of ZnO: V nanorods were investigated by magnetic force microscopy. Images taken of ensembles as well as of single rods clearly display contrast, which is seen as a strong indication of ferromagnetism at room temperature."],["dc.identifier.doi","10.1088/0957-4484/18/12/125609"],["dc.identifier.isi","000245234800026"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/51747"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Iop Publishing Ltd"],["dc.relation.issn","1361-6528"],["dc.relation.issn","0957-4484"],["dc.title","Properties of V-implanted ZnO nanorods"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","236"],["dc.bibliographiccitation.issue","1-6"],["dc.bibliographiccitation.journal","Superlattices and Microstructures"],["dc.bibliographiccitation.lastpage","241"],["dc.bibliographiccitation.volume","42"],["dc.contributor.author","Schlenker, E."],["dc.contributor.author","Bakin, A."],["dc.contributor.author","Postels, B."],["dc.contributor.author","Mofor, A. C."],["dc.contributor.author","Kreye, M."],["dc.contributor.author","Ronning, Carsten"],["dc.contributor.author","Sievers, S."],["dc.contributor.author","Albrecht, M."],["dc.contributor.author","Siegner, Uwe"],["dc.contributor.author","Kling, R."],["dc.contributor.author","Waag, Andreas"],["dc.date.accessioned","2018-11-07T11:01:21Z"],["dc.date.available","2018-11-07T11:01:21Z"],["dc.date.issued","2007"],["dc.description.abstract","The magnetic properties of vanadium doped ZnO nanorods formed by different growth methods were examined. The samples under investigation were either grown by metallorganic vapour-phase epitaxy (MOVPE) with in situ incorporation of the V atoms or by aqueous chemical growth (ACG) in combination with an ion-implantation process. The V concentration for all samples was less than 2 at.%. Field-cooled SQUID measurements only reveal a weak ferromagnetic signal still in a very sensitive measuring range. However, the MFM micrographs obtained at room temperature show a clear magnetic contrast and complex structures, the images are in good agreement with the phase images expected for vertically aligned magnetic dipoles. This is a strong indication for a ferromagnetic behaviour at room temperature. (c) 2007 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.spmi.2007.04.043"],["dc.identifier.isi","000250271200043"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/51131"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Academic Press Ltd- Elsevier Science Ltd"],["dc.publisher.place","London"],["dc.relation.conference","Symposium on ZnO and Related Materials held at the 2006 EMRS Spring Meeting"],["dc.relation.eventlocation","Nice, FRANCE"],["dc.relation.issn","0749-6036"],["dc.title","Magnetic characterization of ZnO doped with vanadium"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["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"]]