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Thermodynamics of interacting magnetic nanoparticles

Thermodynamics of interacting magnetic nanoparticles
Thermodynamics of interacting magnetic nanoparticles
We apply the concepts of stochastic thermodynamics combined with transition-state theory to develop a framework for evaluating local heat distributions across the assemblies of interacting magnetic nanoparticles (MPs) subject to time-varying external magnetic fields. We show that additivity of entropy production in the particle state-space allows separating the entropy contributions and evaluating the heat produced by the individual MPs despite interactions. Using MP chains as a model system for convenience, without losing generality, we show that the presence of dipolar interactions leads to significant heat distributions across the chains. Our study also suggests that the typically used hysteresis loops cannot be used as a measure of energy dissipation at the local particle level within MP clusters, aggregates, or assemblies, and explicit evaluation of entropy production based on appropriate theory, such as developed here, becomes necessary.
1550-235X
Torche, Paola, Carolina
4c6a4511-5b7e-4e4b-a565-2eeb6284dd1f
Muñoz-Menendez, Cristina
1f12d377-ee66-4b94-b8f3-c216f8abf48f
Serantes, David
355cd507-e7cc-40b3-b85d-6899b6eb1d0f
Baldomir, Daniel
ef680a25-ff0b-4ce7-b96a-6c498c86aeed
L. Livesey, Karen
003f4530-9376-4c7c-b0cc-06878e116649
Chubykalo-Fesenko, Oksana
533ce8a0-b18b-49d1-8290-2473d4abd126
Ruta, Sergiu
5ee4f1ec-6317-4553-8187-edd3a511bd16
Chantrell, Roy
45d17f05-12c5-4635-8ee4-96ffab10e5ac
Hovorka, Ondrej
a12bd550-ad45-4963-aa26-dd81dd1609ee
Torche, Paola, Carolina
4c6a4511-5b7e-4e4b-a565-2eeb6284dd1f
Muñoz-Menendez, Cristina
1f12d377-ee66-4b94-b8f3-c216f8abf48f
Serantes, David
355cd507-e7cc-40b3-b85d-6899b6eb1d0f
Baldomir, Daniel
ef680a25-ff0b-4ce7-b96a-6c498c86aeed
L. Livesey, Karen
003f4530-9376-4c7c-b0cc-06878e116649
Chubykalo-Fesenko, Oksana
533ce8a0-b18b-49d1-8290-2473d4abd126
Ruta, Sergiu
5ee4f1ec-6317-4553-8187-edd3a511bd16
Chantrell, Roy
45d17f05-12c5-4635-8ee4-96ffab10e5ac
Hovorka, Ondrej
a12bd550-ad45-4963-aa26-dd81dd1609ee

Torche, Paola, Carolina, Muñoz-Menendez, Cristina, Serantes, David, Baldomir, Daniel, L. Livesey, Karen, Chubykalo-Fesenko, Oksana, Ruta, Sergiu, Chantrell, Roy and Hovorka, Ondrej (2020) Thermodynamics of interacting magnetic nanoparticles. Physical Review B, [224429]. (doi:10.1103/PhysRevB.101.224429).

Record type: Article

Abstract

We apply the concepts of stochastic thermodynamics combined with transition-state theory to develop a framework for evaluating local heat distributions across the assemblies of interacting magnetic nanoparticles (MPs) subject to time-varying external magnetic fields. We show that additivity of entropy production in the particle state-space allows separating the entropy contributions and evaluating the heat produced by the individual MPs despite interactions. Using MP chains as a model system for convenience, without losing generality, we show that the presence of dipolar interactions leads to significant heat distributions across the chains. Our study also suggests that the typically used hysteresis loops cannot be used as a measure of energy dissipation at the local particle level within MP clusters, aggregates, or assemblies, and explicit evaluation of entropy production based on appropriate theory, such as developed here, becomes necessary.

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More information

Accepted/In Press date: 29 May 2020
Published date: 24 June 2020

Identifiers

Local EPrints ID: 450856
URI: http://eprints.soton.ac.uk/id/eprint/450856
ISSN: 1550-235X
PURE UUID: 1193e982-5f70-4516-9a91-054e4834468e
ORCID for Ondrej Hovorka: ORCID iD orcid.org/0000-0002-6707-4325

Catalogue record

Date deposited: 16 Aug 2021 16:49
Last modified: 17 Aug 2021 01:46

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Contributors

Author: Paola, Carolina Torche
Author: Cristina Muñoz-Menendez
Author: David Serantes
Author: Daniel Baldomir
Author: Karen L. Livesey
Author: Oksana Chubykalo-Fesenko
Author: Sergiu Ruta
Author: Roy Chantrell
Author: Ondrej Hovorka ORCID iD

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