Models of the energy landscape for an element of shakti spin ice

U. B. Arnalds; S. Y. Liashko; P. F. Bessarab; V. M. Uzdin; H. Jónsson

Geodesic

Parcourir par

Models of the energy landscape for an element of shakti spin ice

U. B. Arnalds ; S. Y. Liashko ; P. F. Bessarab ; V. M. Uzdin ; H. Jónsson

Nanosistemy: fizika, himiâ, matematika, Tome 9 (2018) no. 6, pp. 711-715.

Voir la notice de l'article provenant de la source Math-Net.Ru

Résumé

Micromagnetic calculations are compared with faster model calculations of interacting nanoscopic magnetic islands representing an element of a shakti spin ice lattice. Several pathways for transitions between equivalent ground states are studied. The model calculations describe the interaction between the islands either with the point dipole approximation, or with a dumbbell approximation where the distance between the two poles is optimized to match the micromagnetic results. The closest agreement in the energy of both local minima as well as transition state configurations where one macrospin has rotated by 90$^\circ$ is obtained with a dumbbell model where the distance between the poles is ca. 20% smaller than the island length.

Keywords: magnetic islands, activation energy, micromagnetics, dumbbell, spin ice.
Mots-clés : dipole interaction

@article{NANO_2018_9_6_a1,
     author = {U. B. Arnalds and S. Y. Liashko and P. F. Bessarab and V. M. Uzdin and H. J\'onsson},
     title = {Models of the energy landscape for an element of shakti spin ice},
     journal = {Nanosistemy: fizika, himi\^a, matematika},
     pages = {711--715},
     publisher = {mathdoc},
     volume = {9},
     number = {6},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/NANO_2018_9_6_a1/}
}

TY  - JOUR
AU  - U. B. Arnalds
AU  - S. Y. Liashko
AU  - P. F. Bessarab
AU  - V. M. Uzdin
AU  - H. Jónsson
TI  - Models of the energy landscape for an element of shakti spin ice
JO  - Nanosistemy: fizika, himiâ, matematika
PY  - 2018
SP  - 711
EP  - 715
VL  - 9
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/NANO_2018_9_6_a1/
LA  - en
ID  - NANO_2018_9_6_a1
ER  -

%0 Journal Article
%A U. B. Arnalds
%A S. Y. Liashko
%A P. F. Bessarab
%A V. M. Uzdin
%A H. Jónsson
%T Models of the energy landscape for an element of shakti spin ice
%J Nanosistemy: fizika, himiâ, matematika
%D 2018
%P 711-715
%V 9
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NANO_2018_9_6_a1/
%G en
%F NANO_2018_9_6_a1

U. B. Arnalds; S. Y. Liashko; P. F. Bessarab; V. M. Uzdin; H. Jónsson. Models of the energy landscape for an element of shakti spin ice. Nanosistemy: fizika, himiâ, matematika, Tome 9 (2018) no. 6, pp. 711-715. http://geodesic.mathdoc.fr/item/NANO_2018_9_6_a1/