Sievers, Niklas

[["dc.bibliographiccitation.artnumber","PII S0921-4534(02)00793-1"],["dc.bibliographiccitation.firstpage","554"],["dc.bibliographiccitation.journal","Physica C Superconductivity"],["dc.bibliographiccitation.lastpage","557"],["dc.bibliographiccitation.volume","372"],["dc.contributor.author","Irgmaier, K."],["dc.contributor.author","Semerad, R."],["dc.contributor.author","Prusseit, W."],["dc.contributor.author","Ludsteck, A."],["dc.contributor.author","Sigl, G."],["dc.contributor.author","Kinder, H."],["dc.contributor.author","Dzick, J."],["dc.contributor.author","Sievers, S."],["dc.contributor.author","Freyhardt, Herbert C."],["dc.contributor.author","Peters, K."],["dc.date.accessioned","2018-11-07T10:17:38Z"],["dc.date.available","2018-11-07T10:17:38Z"],["dc.date.issued","2002"],["dc.description.abstract","YBCO films for microwave applications are usually deposited on expensive, single crystal substrates. Here, technical ceramics offer a variety of advantages with respect to rf-filters. They are available in arbitrary large size, the dielectric constant is isotropic, and can be selected from a range between 10 and I 10 for ceramics with appropriate composition. The main shortcoming is the polycrystalline nature of such ceramic substrates. However, the ion beam assisted deposition (IBAD) technique allows YBCO growth with excellent crystalline orientation and yields superconducting properties comparable to epitaxial films on single crystal substrates. As an example we tested substrates made of SM 210, a standard low loss microwave ceramic from Kyocera, with a dielectric constant of 21 close to that of LaAlO3. After proper polishing the 2\" substrates a 2 pin thick YSZ-IBAD buffer was applied by PLD. YBCO films of various thicknesses were deposited by thermal evaporation. These films exhibited critical current densities in excess of 1.5 MA/cm(2) at 77 K. We report evaluation of the surface resistance of the YBCO films and the substrate losses by a standard dielectric resonator technique in the frequency regime around 10 GHz and discuss the technological impact of these results on future filter development. (C) 2002 Elsevier Science B.V. All rights reserved."],["dc.identifier.doi","10.1016/S0921-4534(02)00793-1"],["dc.identifier.isi","000177936400135"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41270"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.publisher.place","Amsterdam"],["dc.relation.conference","5th European Conference on Applied Superconductivity (EUCAS 2001)"],["dc.relation.eventlocation","TECH UNIV DENMARK, LYNGBY, DENMARK"],["dc.relation.issn","0921-4534"],["dc.title","Deposition and microwave performance of YBCO films on technical ceramics"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","PII S0921-4534(02)00892-4"],["dc.bibliographiccitation.firstpage","723"],["dc.bibliographiccitation.journal","Physica C Superconductivity"],["dc.bibliographiccitation.lastpage","728"],["dc.bibliographiccitation.volume","372"],["dc.contributor.author","Dzick, J."],["dc.contributor.author","Hoffmann, J."],["dc.contributor.author","Sievers, S."],["dc.contributor.author","Kautschor, L. O."],["dc.contributor.author","Freyhardt, Herbert C."],["dc.date.accessioned","2018-11-07T10:17:41Z"],["dc.date.available","2018-11-07T10:17:41Z"],["dc.date.issued","2002"],["dc.description.abstract","For high-current carrying YBa2Cu3O7-x films, biaxially textured yttria-stabilized zirconia (YSZ) films serve as templates. The YSZ layers are textured by an ion-beam-assisted deposition process (IBAD). Our present investigations of the texture evolution indicated a sequence of at least three characteristic growth stages. During an initial stage, wire-textured (011)-oriented grains nucleated. This stage was followed by a transition stage where (DOI)-oriented grains grew epitaxially on (011) grains which were favorably oriented with respect to the assisting beam. During the final stage a growth selection led to an improvement of the in-plane alignment of those (001)-oriented grains with their (111) axis parallel to the assisting beam. Each one of these growth stages was dominated by specific underlying mechanisms which have been identified. Internal film stresses caused by the massive bombardment of the assisting beam might influence the orientation of nuclei. Ion-beam-induced homoepitaxy generated epitaxial relations between nuclei and underlying film layers. Finally, anisotropic sputter rates caused alterations in growth rates of differently oriented grains that led to an overgrowth of misoriented grains. These results will be summarized in the form of a schematic growth model for IBAD-YSZ films. (C) 2002 Elsevier Science B.V. All rights reserved."],["dc.identifier.doi","10.1016/S0921-4534(02)00892-4"],["dc.identifier.isi","000178018800036"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41278"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.publisher.place","Amsterdam"],["dc.relation.conference","5th European Conference on Applied Superconductivity (EUCAS 2001)"],["dc.relation.eventlocation","TECH UNIV DENMARK, LYNGBY, DENMARK"],["dc.relation.issn","0921-4534"],["dc.title","Ion-beam-assisted texturing of YSZ layers"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","PII S0953-2048(04)65823-4"],["dc.bibliographiccitation.firstpage","65"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Superconductor Science and Technology"],["dc.bibliographiccitation.lastpage","70"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Guth, K."],["dc.contributor.author","Born, V."],["dc.contributor.author","Brandt, C."],["dc.contributor.author","Sievers, S."],["dc.contributor.author","Freyhardt, Herbert C."],["dc.contributor.author","Jooss, C."],["dc.date.accessioned","2018-11-07T10:53:16Z"],["dc.date.available","2018-11-07T10:53:16Z"],["dc.date.issued","2004"],["dc.description.abstract","Using magneto optical imaging a comparative study of YBa2Cu3Odelta thin films grown on Gd-10at% doped CeO2 buffered Ni and SrTiO3 bicrystals with tilt angles ranging from 3degrees to 16degrees has been made. The Ni substrates have been chosen as a model system for the RABiTS coated conductor technology. It is found that the YBa2Cu3Odelta grain boundaries on Ni exhibit improved superconducting transport properties, while for the intra-granular critical currents a moderate decrease is observed. The improved J(gb)/J(c) ratio could be detected for all studied grain boundary angles as well as over the whole accessible temperature range from 8 to 60 K. Extensive x-ray measurements on the in- and out-of-plane texture of all layers have been performed to explain the change in the intra- and inter-granular critical currents."],["dc.identifier.doi","10.1088/0953-2048/17/1/011"],["dc.identifier.isi","000220728500014"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/49316"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Iop Publishing Ltd"],["dc.relation.issn","0953-2048"],["dc.title","Improved grain boundary currents in textured YBa2Cu3O delta thin films on bicrystalline Ni substrates"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["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.firstpage","227"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","European Journal of Clinical Investigation"],["dc.bibliographiccitation.lastpage","234"],["dc.bibliographiccitation.volume","28"],["dc.contributor.author","Mohr, M."],["dc.contributor.author","Höpken, U."],["dc.contributor.author","Oppermann, M."],["dc.contributor.author","Mathes, C."],["dc.contributor.author","Goldmann, K."],["dc.contributor.author","Siever, S."],["dc.contributor.author","Götze, O."],["dc.contributor.author","Burchardi, H."],["dc.date.accessioned","2021-12-08T12:27:32Z"],["dc.date.available","2021-12-08T12:27:32Z"],["dc.date.issued","2002"],["dc.identifier.doi","10.1046/j.1365-2362.1998.00260.x"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/95380"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-476"],["dc.relation.issn","0014-2972"],["dc.rights.uri","http://doi.wiley.com/10.1002/tdm_license_1.1"],["dc.title","Effects of anti-C5a monoclonal antibodies on oxygen use in a porcine model of severe sgifis"],["dc.title.alternative","Anti-C5a monoclonal antibodies in sgifis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","20"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Oral surgery, oral medicine, oral pathology and oral radiology"],["dc.bibliographiccitation.lastpage","28"],["dc.bibliographiccitation.volume","123"],["dc.contributor.author","Kauffmann, Philipp"],["dc.contributor.author","Hahn, Wolfram"],["dc.contributor.author","Sievers, Niklas"],["dc.contributor.author","Troeltzsch, Markus"],["dc.contributor.author","Hohloch, Karin"],["dc.contributor.author","Brockmeyer, Phillipp"],["dc.contributor.author","Cordesmeyer, Robert"],["dc.contributor.author","Schliephake, Henning"],["dc.contributor.author","Gruber, Rudolf Matthias"],["dc.date.accessioned","2018-06-25T07:43:01Z"],["dc.date.available","2018-06-25T07:43:01Z"],["dc.date.issued","2017-01"],["dc.description.abstract","We compared the intraindividual effects of increasing zoledronic acid (ZA) concentrations on osteoblast-like cells with different embryologic origins."],["dc.fs.pkfprnr","2489"],["dc.identifier.doi","10.1016/j.oooo.2016.08.010"],["dc.identifier.fs","626267"],["dc.identifier.pmid","27720655"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15133"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.eissn","2212-4411"],["dc.title","Osteoblast-like cells with different embryologic origins behave differently in increasing zoledronic acid concentrations: a pilot study in pigs"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["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.firstpage","792"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","European Journal of Paediatric Neurology"],["dc.bibliographiccitation.lastpage","800"],["dc.bibliographiccitation.volume","23"],["dc.contributor.author","Storm van's Gravesande, K."],["dc.contributor.author","Calabrese, P."],["dc.contributor.author","Blaschek, A."],["dc.contributor.author","Rostásy, K."],["dc.contributor.author","Huppke, P."],["dc.contributor.author","Rothe, L."],["dc.contributor.author","Mall, V."],["dc.contributor.author","Kessler, J."],["dc.contributor.author","Kalbe, E."],["dc.contributor.author","Kraus, V."],["dc.contributor.author","Dornfeld, E."],["dc.contributor.author","Elpers, C."],["dc.contributor.author","Lohmann, H."],["dc.contributor.author","Weddige, A."],["dc.contributor.author","Hagspiel, S."],["dc.contributor.author","Kirschner, J."],["dc.contributor.author","Brehm, M."],["dc.contributor.author","Blank, C."],["dc.contributor.author","Schubert, J."],["dc.contributor.author","Schimmel, M."],["dc.contributor.author","Pacheè, S."],["dc.contributor.author","Mohrbach, M."],["dc.contributor.author","Karenfort, M."],["dc.contributor.author","Kamp, G."],["dc.contributor.author","Lücke, T."],["dc.contributor.author","Neumann, H."],["dc.contributor.author","Lutz, S."],["dc.contributor.author","Gierse, A."],["dc.contributor.author","Sievers, S."],["dc.contributor.author","Schiffmann, H."],["dc.contributor.author","de Soye, I."],["dc.contributor.author","Trollmann, R."],["dc.contributor.author","Candova, A."],["dc.contributor.author","Rosner, M."],["dc.contributor.author","Neu, A."],["dc.contributor.author","Romer, G."],["dc.contributor.author","Seidel, U."],["dc.contributor.author","John, R."],["dc.contributor.author","Hofmann, C."],["dc.contributor.author","Schulz, A."],["dc.contributor.author","Kinder, S."],["dc.contributor.author","Bertolatus, A."],["dc.contributor.author","Scheidtmann, K."],["dc.contributor.author","Lasogga, R."],["dc.contributor.author","Leiz, S."],["dc.contributor.author","Alber, M."],["dc.contributor.author","Kranz, J."],["dc.contributor.author","Bajer-Kornek, B."],["dc.contributor.author","Seidl, R."],["dc.contributor.author","Novak, A."],["dc.date.accessioned","2020-12-10T14:23:42Z"],["dc.date.available","2020-12-10T14:23:42Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1016/j.ejpn.2019.08.006"],["dc.identifier.issn","1090-3798"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72016"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","The Multiple Sclerosis Inventory of Cognition for Adolescents (MUSICADO): A brief screening instrument to assess cognitive dysfunction, fatigue and loss of health-related quality of life in pediatric-onset multiple sclerosis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["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"]]