Feist, Armin

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[["dc.contributor.author","Feist, Armin"],["dc.contributor.author","Echternkamp, Katharina E."],["dc.contributor.author","Bormann, Reiner"],["dc.contributor.author","Rubiano da Silva, Nara"],["dc.contributor.author","Möller, Marcel"],["dc.contributor.author","Liang, Wenxi"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2020-02-03T09:17:06Z"],["dc.date.available","2020-02-03T09:17:06Z"],["dc.date.issued","2016"],["dc.description.abstract","We demonstrate the generation of low-emittance ultrashort electron pulses derived from nanoscale photocathodes and their application in ultrafast transmission electron microscopy. Few-nanometer electron focal spot diameters are achieved, enabling the investigation of ultrafast nanoscale dynamics."],["dc.identifier.doi","10.1364/up.2016.uth2b.5"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62937"],["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","Few-nanometer femtosecond electron probe pulses in ultrafast transmission electron microscop"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

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[["dc.bibliographiccitation.firstpage","711"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","MRS Bulletin"],["dc.bibliographiccitation.lastpage","719"],["dc.bibliographiccitation.volume","46"],["dc.contributor.author","Harvey, Tyler R."],["dc.contributor.author","Rubiano da Silva, Nara"],["dc.contributor.author","Gaida, John H."],["dc.contributor.author","Möller, Marcel"],["dc.contributor.author","Feist, Armin"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2021-12-01T09:24:01Z"],["dc.date.available","2021-12-01T09:24:01Z"],["dc.date.issued","2021"],["dc.description.abstract","Abstract The spatial features of ultrafast changes in magnetic textures carry detailed information on microscopic couplings and energy transport mechanisms. Electrons excel in imaging such picosecond or shorter processes at nanometer length scales. We review the range of physical interactions that produce ultrafast magnetic contrast with electrons, and specifically highlight the recent emergence of ultrafast Lorentz transmission electron microscopy. From the fundamental processes involved in demagnetization at extremely short timescales to skyrmion-based devices, we show that ultrafast electron imaging will be a vital tool in solving pressing problems in magnetism and magnetic materials where nanoscale inhomogeneity, microscopic field measurement, non-equilibrium behavior or dynamics are involved. Graphic abstract"],["dc.identifier.doi","10.1557/s43577-021-00166-5"],["dc.identifier.pii","166"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/94825"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-478"],["dc.relation","SFB 1073: Kontrolle von Energiewandlung auf atomaren Skalen"],["dc.relation","SFB 1073 | Topical Area A: Control of dissipation"],["dc.relation","SFB 1073 | Topical Area A | A05 Nanoskalige Untersuchung raumzeitlicher Relaxation in heterogenen Systemen mit ultraschneller Transmissionselektronenmikroskopie"],["dc.relation.eissn","1938-1425"],["dc.relation.issn","0883-7694"],["dc.rights","CC BY 4.0"],["dc.title","Ultrafast electron microscopy for probing magnetic dynamics"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["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"]]

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[["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"]]

[["dc.bibliographiccitation.firstpage","63"],["dc.bibliographiccitation.journal","Ultramicroscopy"],["dc.bibliographiccitation.lastpage","73"],["dc.bibliographiccitation.volume","176"],["dc.contributor.author","Feist, Armin"],["dc.contributor.author","Bach, Nora"],["dc.contributor.author","da Silva, Nara Rubiano"],["dc.contributor.author","Danz, Thomas"],["dc.contributor.author","Möller, Marcel"],["dc.contributor.author","Priebe, Katharina E."],["dc.contributor.author","Domröse, Till"],["dc.contributor.author","Gatzmann, J. Gregor"],["dc.contributor.author","Rost, Stefan"],["dc.contributor.author","Schauss, Jakob"],["dc.contributor.author","Strauch, Stefanie"],["dc.contributor.author","Bormann, Reiner"],["dc.contributor.author","Sivis, Murat"],["dc.contributor.author","Schäfer, Sascha"],["dc.contributor.author","Ropers, Claus"],["dc.date.accessioned","2018-11-07T10:23:59Z"],["dc.date.accessioned","2020-02-03T09:08:33Z"],["dc.date.available","2018-11-07T10:23:59Z"],["dc.date.available","2020-02-03T09:08:33Z"],["dc.date.issued","2017"],["dc.description.abstract","We present the development of the first ultrafast transmission electron microscope (UTEM) driven by localized photoemission from a field emitter cathode. We describe the implementation of the instrument, the photoemitter concept and the quantitative electron beam parameters achieved. Establishing a new source for ultrafast TEM, the Göttingen UTEM employs nano-localized linear photoemission from a Schottky emitter, which enables operation with freely tunable temporal structure, from continuous wave to femtosecond pulsed mode. Using this emission mechanism, we achieve record pulse properties in ultrafast electron microscopy of 9Å focused beam diameter, 200fs pulse duration and 0.6eV energy width. We illustrate the possibility to conduct ultrafast imaging, diffraction, holography and spectroscopy with this instrument and also discuss opportunities to harness quantum coherent interactions between intense laser fields and free-electron beams."],["dc.identifier.arxiv","1611.05022v1"],["dc.identifier.doi","10.1016/j.ultramic.2016.12.005"],["dc.identifier.isi","000403992200010"],["dc.identifier.pmid","28139341"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42570"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/62933"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["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","1879-2723"],["dc.relation.issn","0304-3991"],["dc.rights","CC BY-NC-ND 4.0"],["dc.title","Ultrafast transmission electron microscopy using a laser-driven field emitter: Femtosecond resolution with a high coherence electron beam"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

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