Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Arnalds, Unnar B."'
Autor:
Stopfel, Henry, Arnalds, Unnar B., Stein, Aaron, Hase, Thomas P. A., Hjörvarsson, Björgvin, Kapaklis, Vassilios
Publikováno v:
Phys. Rev. Materials 5, 114410 (2021)
The interplay between topology and energy-hierarchy plays a vital role in the collective magnetic order in artificial ferroic systems. Here we investigate, experimentally, the effect of having one or two activation energies of interacting Ising-like
Externí odkaz:
http://arxiv.org/abs/2106.10510
We present a study of the synthesis of epitaxial V$_2$O$_3$ films on $c$-plane Al$_2$O$_3$ substrates by reactive dc-magnetron sputtering. The results reveal a temperature window, at substantially lower values than previously reported, wherein epitax
Externí odkaz:
http://arxiv.org/abs/1801.07075
Autor:
Stopfel, Henry, Östman, Erik, Chioar, Ioan-Augustin, Arnalds, Unnar B., Greving, David, Hase, Thomas P. A., Stein, Aaron, Hjörvarsson, Björgvin, Kapaklis, Vassilios
Publikováno v:
Phys. Rev. B 98, 014435 (2018)
In order to explain and predict the properties of many physical systems, it is essential to understand the interplay of different energy-scales. Here we present investigations of the magnetic order in thermalised artificial spin ice structures, with
Externí odkaz:
http://arxiv.org/abs/1711.07754
Autor:
Östman, Erik, Stopfel, Henry, Chioar, Ioan-Augustin, Arnalds, Unnar B., Stein, Aaron, Kapaklis, Vassilios, Hjörvarsson, Björgvin
Publikováno v:
Nature Physics (2018)
The modification of geometry and interactions in two-dimensional magnetic nanosystems has enabled a range of studies addressing the magnetic order, collective low-energy dynamics, and emergent magnetic properties, in e.g. artificial spin ice structur
Externí odkaz:
http://arxiv.org/abs/1706.02127
Autor:
Arnalds, Unnar B.
The topic of this thesis is the investigation of the magnetic properties of artificially created magnetic structures. Applying different characterization techniques, ranging from direct imaging methods to reciprocal space techniques, the properties o
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-172386
Autor:
Arnalds, Unnar B., Chico, Jonathan, Stopfel, Henry, Kapaklis, Vassilios, Bärenbold, Oliver, Verschuuren, Marc A., Wolff, Ulrike, Neu, Volker, Bergman, Anders, Hjörvarsson, Björgvin
Publikováno v:
New Journal of Pysics, 18, 023008 (2016)
We present a direct experimental investigation of the thermal ordering in an artificial analogue of an asymmetric two dimensional Ising system composed of a rectangular array of nano-fabricated magnetostatically interacting islands. During fabricatio
Externí odkaz:
http://arxiv.org/abs/1507.01126
Autor:
Melander, Emil, Östman, Erik, Keller, Janine, Schmidt, Jan, Papaioannou, Evangelos Th., Kapaklis, Vassilios, Arnalds, Unnar B., Caballero, B., García-Martín, A., Cuevas, J. C., Hjörvarsson, Björgvin
Publikováno v:
Applied Physics Letters, 101, 063107 (2012)
Extraordinary optical transmission is observed due to the excitation of surface plasmon polaritons (SPPs) in 2-Dimensional hexagonal anti-dot patterns of pure Ni thin films, grown on sapphire substrates. A strong enhancement of the polar Kerr rotatio
Externí odkaz:
http://arxiv.org/abs/1207.3697
Autor:
Kapaklis, Vassilios, Arnalds, Unnar B., Harman-Clarke, Adam, Papaioannou, Evangelos Th., Karimipour, Masoud, Korelis, Panagiotis, Taroni, Andrea, Holdsworth, Peter C. W., Bramwell, Steven T., Hjörvarsson, Björgvin
Publikováno v:
New J. Phys. 14 (2012) 035009
Artificial spin ice arrays of micromagnetic islands are a means of engineering additional energy scales and frustration into magnetic materials. Despite much progress in elucidating the properties of such arrays, the `spins' in the systems studied so
Externí odkaz:
http://arxiv.org/abs/1108.1092
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Akademický článek
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