Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Stopfel, Henry"'
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
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
Autor:
Skovdal, Björn Erik, Strandqvist, Nanny, Stopfel, Henry, Pohlit, Merlin, Warnatz, Tobias, Slöetjes, Samuel D., Kapaklis, Vassilios, Hjörvarsson, Björgvin
Publikováno v:
Phys. Rev. B 104, 014434 (2021)
Spin and spatial dimensionalities are universal concepts, essential for describing both phase transitions and dynamics in magnetic materials. Lately, these ideas have been adopted to describe magnetic properties of metamaterials, as well as to replic
Externí odkaz:
http://arxiv.org/abs/2102.08731
Autor:
Pohlit, Merlin, Muscas, Giuseppe, Chioar, Ioan-Augustin, Stopfel, Henry, Ciuciulkaite, Agne, Östman, Erik, Pappas, Spyridon D., Stein, Aaron, Hjörvarsson, Björgvin, Jönsson, Petra E., Kapaklis, Vassilios
Publikováno v:
Phys. Rev. B 101, 134404 (2020)
We report on the study of the thermal dynamics of square artificial spin ice, probed by means of temperature and frequency dependent AC susceptibility. Pronounced influence of the inter-island coupling strength was found on the frequency response of
Externí odkaz:
http://arxiv.org/abs/2001.04746
Autor:
Kumar, Ankit, Behera, Nilamani, Gupta, Rahul, Husain, Sajid, Stopfel, Henry, Kapaklis, Vassilios, Brucas, Rimantas, Svedlindh, Peter
Publikováno v:
J. Phys. D: Appl. Phys. 53 355003 (2020)
Spin-orbit torques in ferromagnetic (FM)/non-magnetic (NM) heterostructures offer more energy-efficient means to realize spin-logic devices; however, their strengths are determined by the heterostructure interface. This work examines crystal orientat
Externí odkaz:
http://arxiv.org/abs/1911.05487
Autor:
Stopfel, Henry
Mesoscopic spin systems can be designed and fabricated using modern nano-fabrication techniques. These systems can contain large numbers of patterned ferromagnetic elements, for which the shape will generally determine their effective mesospin dimens
Externí odkaz:
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-328790
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:
Larsen, Simon R., Hedlund, Daniel, Stopfel, Henry, Karlsson, Dennis, Christensen, Christian K., Svedlindh, Peter, Cedervall, Johan
Publikováno v:
In Journal of Alloys and Compounds 25 April 2021 861
