Ulrichs, Henning

[["dc.bibliographiccitation.artnumber","097203"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Physical Review Letters"],["dc.bibliographiccitation.volume","118"],["dc.contributor.author","Eggebrecht, Tim"],["dc.contributor.author","Möller, Marcel"],["dc.contributor.author","Gatzmann, J. Gregor"],["dc.contributor.author","Rubiano da Silva, Nara"],["dc.contributor.author","Feist, Armin"],["dc.contributor.author","Martens, Ulrike"],["dc.contributor.author","Ulrichs, Henning"],["dc.contributor.author","Münzenberg, Markus"],["dc.contributor.author","Ropers, Claus"],["dc.contributor.author","Schäfer, Sascha"],["dc.date.accessioned","2020-12-10T18:25:43Z"],["dc.date.available","2020-12-10T18:25:43Z"],["dc.date.issued","2017"],["dc.description.abstract","Magnetic topological defects, including vortices and Skyrmions, can be stabilized as equilibrium structures by tuning intrinsic magnetic interactions and stray field geometries. Here, employing rapid quench conditions, we report the observation of a light-induced metastable magnetic texture, which consists of a dense nanoscale network of vortices and antivortices and exhibits glass-like properties. Our results highlight the emergence of complex ordering regimes in optically driven magnetic systems, opening up new pathways to harness ultrafast far-from-equilibrium relaxation processes."],["dc.identifier.arxiv","1609.04000"],["dc.identifier.doi","10.1103/PhysRevLett.118.097203"],["dc.identifier.eissn","1079-7114"],["dc.identifier.issn","0031-9007"],["dc.identifier.pmid","28306279"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75800"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A | A05 Nanoskalige Untersuchung raumzeitlicher Relaxation in heterogenen Systemen mit ultraschneller Transmissionselektronenmikroskopie"],["dc.relation.eissn","1079-7114"],["dc.relation.issn","0031-9007"],["dc.relation.issn","1079-7114"],["dc.title","Light-Induced Metastable Magnetic Texture Uncovered by in situ Lorentz Microscopy"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","IEEE Transactions on Magnetics"],["dc.bibliographiccitation.lastpage","4"],["dc.bibliographiccitation.volume","53"],["dc.contributor.author","Wittrock, Steffen"],["dc.contributor.author","Meyer, Dennis"],["dc.contributor.author","Ulrichs, Henning"],["dc.contributor.author","Walowski, Jakob"],["dc.contributor.author","Mansurova, Maria"],["dc.contributor.author","Martens, Ulrike"],["dc.contributor.author","Müller, Markus"],["dc.contributor.author","Münzenberg, Markus"],["dc.date.accessioned","2020-12-10T18:26:18Z"],["dc.date.available","2020-12-10T18:26:18Z"],["dc.date.issued","2017"],["dc.description.abstract","Spin currents offer a way to control static and dynamic magnetic properties, and therefore they are crucial for next-generation MRAM devices or spin-torque oscillators. Manipulating the dynamics is especially interesting within the context of photo-magnonics. In typical d$ transition metal ferromagnets like CoFeB, the lifetime of light-induced magnetization dynamics is restricted to about 1 ns, which e.g. strongly limits the opportunities to exploit the wave nature in a magnonic crystal filtering device. Here, we investigate the potential of spin-currents to increase the spin wave lifetime in a functional bilayer system, consisting of a heavy metal (8 nm of $\\betaehBTantalum (Platinum)) and 5 nm CoFeB. Due to the spin Hall effect, the heavy metal layer generates a transverse spin current when a lateral charge current passes through the strip. Using time-resolved all-optical pump-probe spectroscopy, we investigate how this spin current affects the magnetization dynamics in the adjacent CoFeB layer. We observed a linear spin current manipulation of the effective Gilbert damping parameter for the Kittel mode from which we were able to determine the system's spin Hall angles. Furthermore, we measured a strong influence of the spin current on a high-frequency mode. We interpret this mode an an exchange dominated higher order spin-wave resonance. Thus we infer a strong dependence of the exchange constant on the spin current."],["dc.identifier.arxiv","1912.07728v1"],["dc.identifier.doi","10.1109/TMAG.2017.2703856"],["dc.identifier.eissn","1941-0069"],["dc.identifier.issn","0018-9464"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/76031"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.relation.issn","0018-9464"],["dc.relation.issn","1941-0069"],["dc.title","Spin-Current Manipulation of Photo-Induced Magnetization Dynamics in Heavy Metal/Ferromagnet Double Layer-Based Nanostructures"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","UTh4A.44"],["dc.contributor.author","Eggebrecht, Tim"],["dc.contributor.author","Möller, Marcel"],["dc.contributor.author","Gatzmann, Jan Gregor"],["dc.contributor.author","Rubiano da Silva, Nara"],["dc.contributor.author","Feist, Armin"],["dc.contributor.author","Martens, Ulrike"],["dc.contributor.author","Ulrichs, Henning"],["dc.contributor.author","Münzenberg, Markus"],["dc.contributor.author","Ropers, Claus"],["dc.contributor.author","Schäfer, Sascha"],["dc.date.accessioned","2020-02-03T09:15:12Z"],["dc.date.available","2020-02-03T09:15:12Z"],["dc.date.issued","2016"],["dc.description.abstract","Lorentz microscopy with in-situ femtosecond laser excitation allows for the investigation of optically triggered magnetic processes with nanometer spatial resolution. Here, we demonstrate the light-induced formation of nanoscale magnetic vortex-antivortex networks in thin iron layers."],["dc.identifier.doi","10.1364/UP.2016.UTh4A.44"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62936"],["dc.language.iso","en"],["dc.publisher","OSA - The Optical Society"],["dc.publisher.place","Washington, D.C."],["dc.relation.conference","International Conference on Ultrafast Phenomena 2016"],["dc.relation.eventend","2016-07-22"],["dc.relation.eventlocation","Santa Fe, New Mexico United States"],["dc.relation.eventstart","2016-07-17"],["dc.relation.isbn","978-1-943580-18-7"],["dc.relation.ispartof","Proceedings of the International Conference on Ultrafast Phenomena 2016"],["dc.title","Optically induced nanoscale networks of topological magnetic defects"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]