Uppröðun og hreyfifræði í varmavirkum nanómynstruðum segulkerfum - verkefni lokið
Fréttatilkynning verkefnisstjóra
The results obtained in the project will be further used for theoretical understanding of the physics of interacting and frustrated systems, developing magnetic materials and creating new systems of artificial spin arrangements.
Artificial
spin systems have enabled experimental investigations on ordering phenomena
which previously have not been possible. In these systems geometrical
parameters can be controlled and the energy landscape tuned to create systems
exhibiting thermal dynamics and ordering as well as static athermal systems.
Geometrical arrangements including artificial spin ice and twodimensional Ising
systems have been investigated yielding results on how strongly the geometry of
the systems affects their physical properties and ordering as well as the
dynamics involved in reaching a low energy ground state. New magnetic materials
suitable for such structures have been investigated including amorphous thin
layers, embedded iron layers in palladium as well as perpendicular magnetic
anisotropy multilayers.
Heiti verkefnis: Uppröðun og hreyfifræði í
varmavirkum nanómynstruðum segulkerfum / Ordering and dynamics in thermal
nanomagnetic systems
Verkefnisstjóri: Unnar B. Arnalds, Háskóla Íslands
Tegund styrks: Rannsóknastöðustyrkur
Styrkár: 2014-2016
Fjárhæð styrks: 20,988 millj. kr. alls
Tilvísunarnúmer Rannís: 141518
The results obtained in the project will be further used for theoretical understanding of the physics of interacting and frustrated systems, developing magnetic materials and creating new systems of artificial spin arrangements. The results of these materials investigations and experiments involving the ordering and thermal dynamics of artificial spin systems have been published in several research journals. The results of the project have already been cited in numerous publications within the scientific community.
The results of the project have been presented at several international conferences, workshops and open presentations including:
- The 20th
International conference on Magnetism in Barcelona, July 2015.
- The 9th
international symposium on Metallic Multilayers, June 2016.
- Nanomagnetism
workshop in Iceland, April 2015.
- SCANDEM
conference, Iceland, June 2017.
Overview of
peer reviewed publications related to the project
[1] The importance of the weak: Interaction modifiers in artificial spin ices E. Östman, H. Stopfel, I-A. Chioar, U. B. Arnalds, A. Stein, V. Kapaklis, B. Hjörvarsson. arXiv:1706.02127 (2017).
[2] Excitation dynamics in magnetic arrays H. Stopfel, E. Östman, I-A. Chioar, U. B. Arnalds, D. Greving, A. Stein, B. Hjörvarsson, V. Kapaklis. Manuscript (2017).
[3] A new look on the two-dimensional Ising model: thermal artificial spins U. B. Arnalds, J. Chico, H. Stopfel, V. Kapaklis, O. Bärenbold, M. A. Verschuuren, U. Wolff, V. Neu, A. Bergman, B. Hjörvarsson. New Journal of Physics 18 023008 (2016).
[4] Tailoring anisotropy and domain structure in amorphous TbCo thin films through combinatorial methods A. Frisk, F. Magnus, S. George, U. B. Arnalds, G. Andersson. Journal of Physics D: Applied Physics 49 (3), 035005 (2016).
[5] Observation of a periodic runaway in the reactive Ar/O2 high power impulse magnetron sputtering discharge S. Shayestehaminzadeh, U. B. Arnalds, R. L. Magnusson, S. Olafsson. AIP Advances 5 (11), 117240 (2015).
[6] A magnetic atomic laminate from thin film synthesis:(Mo0.5Mn0.5)2GaC R. Meshkian, A. S. Ingason, U. B. Arnalds, F. Magnus, J. Lu, and J. Rosen. APL Materials 3 (7), 076102 (2015).
[7] Theoretical stability, thin film synthesis and transport properties of the Mon+1GaCn MAX phase R. Meshkian, A. S. Ingason, M. Dahlqvist, A. Petruhins, U. B. Arnalds, F. Magnus, J. Lu, and J. Rosen. physica status solidi (RRL)-Rapid Research Letters, 9 (3), 197 (2015).
[8] Thermal transitions in nano-patterned XY-magnets U. B. Arnalds, M. Ahlberg, M. S. Brewer, V. Kapaklis, E. Th. Papaioannou, M. Karimipour, P. Korelis, A. Stein, S. Ólafsson, T. P. A. Hase, and B. Hjörvarsson. Applied Physics Letters, 105, 042409 (2014).
[9] Thermal fluctuations in artificial spin ice V. Kapaklis, U. B. Arnalds, A. Farhan, R. V. Chopdekar, A. Balan, A. Scholl, L. J. Heyderman, and B. Hjorvarsson. Nature Nanotechnology Letters, 9, 514 (2014).
