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Journal article
Consistent energy barrier distributions in magnetic particle chains
Physica. B, Condensed matter, v 486, pp 173-176
01 Apr 2016
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Abstract
We investigate long-time thermal activation behaviour in magnetic particle chains of variable length. Chains are modelled as Stoner–Wohlfarth particles coupled by dipolar interactions. Thermal activation is described as a hopping process over a multidimensional energy landscape using the discrete orientation model limit of the Landau–Lifshitz–Gilbert dynamics. The underlying master equation is solved by diagonalising the associated transition matrix, which allows the evaluation of distributions of time scales of intrinsic thermal activation modes and their energy representation. It is shown that as a result of the interaction dependence of these distributions, increasing the particle chain length can lead to acceleration or deceleration of the overall relaxation process depending on the initialisation procedure.
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Details
- Title
- Consistent energy barrier distributions in magnetic particle chains
- Creators
- O. Laslett - University of SouthamptonS. Ruta - University of YorkR.W. Chantrell - University of YorkJ. Barker - Tohoku UniversityG. Friedman - Drexel UniversityO. Hovorka - University of Southampton
- Publication Details
- Physica. B, Condensed matter, v 486, pp 173-176
- Publisher
- Elsevier
- Number of pages
- 4
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000370853400039
- Scopus ID
- 2-s2.0-84959420882
- Other Identifier
- 991019168437804721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Condensed Matter