Zobrazeno 1 - 10
of 259
pro vyhledávání: '"Hjörvarsson Björgvin"'
Autor:
Ali, Hasan, Sathyanath, Sharath Kumar Manjeshwar, Tai, Cheuk-Wai, Rusz, Jan, Uusimaki, Toni, Hjörvarsson, Björgvin, Thersleff, Thomas, Leifer, Klaus
The need to acquire multiple angle-resolved electron energy loss spectra (EELS) is one of the several critical challenges associated with electron magnetic circular dichroism (EMCD) experiments. If the experiments are performed by scanning a nanomete
Externí odkaz:
http://arxiv.org/abs/2211.09087
Publikováno v:
Phys. Rev. B 106, 104405 (2022)
We analyse the thermal fluctuations of magnetization textures in two stray field coupled elements, forming mesospins. To this end, the energy landscape associated with the thermal dynamics of the textures is mapped out and asymmetric energy barriers
Externí odkaz:
http://arxiv.org/abs/2207.00395
Autor:
Strandqvist, Nanny, Skovdal, Björn Erik, Pohlit, Merlin, Stopfel, Henry, Kapaklis, Vassilios, Hjörvarsson, Björgvin
We demonstrate directional dependence of the self-modification of internal mesospin textures in magnetic metamaterials, arising from the coupling of the atomic- and mesoscopic length-scales. Dressing the mesospins in different directions enables the
Externí odkaz:
http://arxiv.org/abs/2205.03134
Autor:
Skovdal, Björn Erik, Slöetjes, Samuel D., Pohlit, Merlin, Stopfel, Henry, Kapaklis, Vassilios, Hjörvarsson, Björgvin
Publikováno v:
Phys. Rev B 107, L060406 (2023)
We provide experimental and numerical evidence for thermal excitations within and among magnetic mesospins, forming artificial spin ice structures. At low temperatures, a decrease in magnetization and increase in susceptibility is observed with incre
Externí odkaz:
http://arxiv.org/abs/2205.00938
Metallic discs engineered on the 100 nm scale have an internal magnetic texture which varies from a fully magnetized state to a vortex state with zero moment. The interplay between this internal structure and the inter-disc interactions is studied in
Externí odkaz:
http://arxiv.org/abs/2204.10065
Autor:
Ravensburg, Anna L., Pálsson, Gunnar K., Pohlit, Merlin, Hjörvarsson, Björgvin, Kapaklis, Vassilios
Publikováno v:
Thin Solid Films (2022)
We investigate the growth of thin Fe layers on MgAl$_2$O$_4$~(001) and MgO~(001) substrates using dc magnetron sputtering. The crystal quality of Fe layers deposited on MgAl$_2$O$_4$ is found to be substantially higher as compared to Fe grown on MgO
Externí odkaz:
http://arxiv.org/abs/2204.02286
Autor:
Chioar, Ioan-Augustin, Vantaraki, Christina, Pohlit, Merlin, Rowan-Robinson, Richard M., Papaioannou, Evangelos Th., Hjörvarsson, Björgvin, Kapaklis, Vassilios
Publikováno v:
Applied Physics Letters 120, 032407 (2022)
We study the steering of visible light using a combination of magneto-optical effects and the reconfigurability of magnetic domains in Yttrium-Iron Garnet films. The spontaneously formed stripe domains are used as a field-controlled optical grating,
Externí odkaz:
http://arxiv.org/abs/2111.15219
Autor:
Löfstrand, Julia, Goetz, Inga K., Marattukalam, Jithin J., Hjörvarsson, Björgvin, Nagy, Gyula, Skårman, Björn, Sahlberg, Martin, Jönsson, Petra E.
Publikováno v:
In Materials & Design August 2024 244
Publikováno v:
In Next Materials July 2024 4
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