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

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**Models of the energy landscape for an element of shakti spin ice.** / Arnalds, U. B.; Liashko, S. Y.; Bessarab, P. F.; Uzdin, V. M.; Jonsson, H.

Research output: Contribution to journal › Article › Scientific › peer-review

### Harvard

*Nanosystems: Physics, Chemistry, Mathematics*, vol. 9, no. 6, pp. 711-715. https://doi.org/10.17586/2220-8054-2018-9-6-711-715

### APA

*Nanosystems: Physics, Chemistry, Mathematics*,

*9*(6), 711-715. https://doi.org/10.17586/2220-8054-2018-9-6-711-715

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TY - JOUR

T1 - Models of the energy landscape for an element of shakti spin ice

AU - Arnalds, U. B.

AU - Liashko, S. Y.

AU - Bessarab, P. F.

AU - Uzdin, V. M.

AU - Jonsson, H.

PY - 2018/12

Y1 - 2018/12

N2 - 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 degrees is obtained with a dumbbell model where the distance between the poles is ca. 20 % smaller than the island length.

AB - 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 degrees is obtained with a dumbbell model where the distance between the poles is ca. 20 % smaller than the island length.

KW - magnetic islands

KW - activation energy

KW - micromagnetics

KW - dipole interaction

KW - dumbbell

KW - spin ice

KW - LATTICE

KW - FIELD

U2 - 10.17586/2220-8054-2018-9-6-711-715

DO - 10.17586/2220-8054-2018-9-6-711-715

M3 - Article

VL - 9

SP - 711

EP - 715

JO - Nanosystems: Physics, Chemistry, Mathematics

JF - Nanosystems: Physics, Chemistry, Mathematics

SN - 2220-8054

IS - 6

ER -

ID: 38844356