NanoSQUIDs for Studies on the Magnetization Reversal of Individual Magnetic Nanoparticles

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dc.contributor.advisor Kleiner, Reinhold (Prof. Dr.) Wölbing, Roman 2015-05-07T12:10:44Z 2015-05-07T12:10:44Z 2015-05-07
dc.identifier.other 432200959 de_DE
dc.identifier.uri de_DE
dc.description.abstract The subject of this thesis is the development, characterization and optimization of nanometer-sized superconducting quantum interference devices (nanoSQUIDs) for operation at cryogenic temperatures. This task is motivated by the need for convenient detectors for the investigation of individual magnetic nanoparticles, nanotubes, nanowires or molecular magnets. Two types of devices are considered in this thesis: (a) nanoSQUIDs based on Nb as a superconductor with Josephson junctions having normal metal HfTi barriers and (b) nanoSQUIDs based on Yttrium barium copper oxid (YBCO) as a superconductor with grain boundary Josephson junctions. The nanoSQUIDs have been investigated in terms of sensitivity to magnetic flux in low- and high-field environments. Numerical simulations based on the London and Maxwell equations have been deployed to determine the coupling between the nanoSQUID and a point-like magnetic moment. By using a hybrid magnetometer system consisting of an Nb nanoSQUID and a Si cantilever, individual ferromagnetic nanotubes have been investigated simultaneously by nanoSQUID and torque magnetometry, which yield complementary information of the magnetization reversal processes in the magnetic nanotubes en
dc.language.iso en de_DE
dc.publisher Universität Tübingen de_DE
dc.rights ubt-podok de_DE
dc.rights.uri de_DE
dc.rights.uri en
dc.subject.classification Magnetometer , Quanteninterferometer , Magnetismus , Nanopartikel , Supraleiter de_DE
dc.subject.ddc 530 de_DE
dc.title NanoSQUIDs for Studies on the Magnetization Reversal of Individual Magnetic Nanoparticles en
dc.type PhDThesis de_DE
dcterms.dateAccepted 2015-04-21
utue.publikation.fachbereich Physik de_DE
utue.publikation.fakultaet 7 Mathematisch-Naturwissenschaftliche Fakultät de_DE


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