Simulating the giant magnetocaloric effect-from mean-field theory to microscopic models
Magnetocaloric materials are recognized as one of the major classes of magnetic materials for energy applications, and can be either employed as refrigerants in heat-pumping devices, or in thermomagnetic generators for energy conversion/harvesting. For both applications, having a material that prese...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-02-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2023.1037396/full |
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| author | J. S. Amaral V. S. Amaral |
| author_facet | J. S. Amaral V. S. Amaral |
| author_sort | J. S. Amaral |
| collection | DOAJ |
| description | Magnetocaloric materials are recognized as one of the major classes of magnetic materials for energy applications, and can be either employed as refrigerants in heat-pumping devices, or in thermomagnetic generators for energy conversion/harvesting. For both applications, having a material that presents a first-order magnetic phase transition is advantageous, as this typically leads to enhanced values of magnetization change in temperature (relevant to energy conversion) and of the magnetocaloric effect (relevant to heat-pumping). We present a brief overview of selected models applied to the simulation of applied magnetic field and temperature-dependent magnetization and magnetic entropy change of first-order magnetic phase transition systems, covering mean-field models such as the Landau theory of phase transitions and the Bean-Rodbell model, up to more recent developments using a Ising-like microscopic model with magnetovolume coupling effects. We highlight the fundamental and practical limitations of employing these models and compare predicted thermodynamic properties. |
| first_indexed | 2024-04-10T17:44:12Z |
| format | Article |
| id | doaj.art-5b757a04224042a89fe3f6422a96e7b1 |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-04-10T17:44:12Z |
| publishDate | 2023-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-5b757a04224042a89fe3f6422a96e7b12023-02-03T06:04:29ZengFrontiers Media S.A.Frontiers in Materials2296-80162023-02-011010.3389/fmats.2023.10373961037396Simulating the giant magnetocaloric effect-from mean-field theory to microscopic modelsJ. S. AmaralV. S. AmaralMagnetocaloric materials are recognized as one of the major classes of magnetic materials for energy applications, and can be either employed as refrigerants in heat-pumping devices, or in thermomagnetic generators for energy conversion/harvesting. For both applications, having a material that presents a first-order magnetic phase transition is advantageous, as this typically leads to enhanced values of magnetization change in temperature (relevant to energy conversion) and of the magnetocaloric effect (relevant to heat-pumping). We present a brief overview of selected models applied to the simulation of applied magnetic field and temperature-dependent magnetization and magnetic entropy change of first-order magnetic phase transition systems, covering mean-field models such as the Landau theory of phase transitions and the Bean-Rodbell model, up to more recent developments using a Ising-like microscopic model with magnetovolume coupling effects. We highlight the fundamental and practical limitations of employing these models and compare predicted thermodynamic properties.https://www.frontiersin.org/articles/10.3389/fmats.2023.1037396/fullmagnetic materialsmagnetic refrigerationenergy harvestingfirst-order phase transitionsmagnetovolume coupling |
| spellingShingle | J. S. Amaral V. S. Amaral Simulating the giant magnetocaloric effect-from mean-field theory to microscopic models Frontiers in Materials magnetic materials magnetic refrigeration energy harvesting first-order phase transitions magnetovolume coupling |
| title | Simulating the giant magnetocaloric effect-from mean-field theory to microscopic models |
| title_full | Simulating the giant magnetocaloric effect-from mean-field theory to microscopic models |
| title_fullStr | Simulating the giant magnetocaloric effect-from mean-field theory to microscopic models |
| title_full_unstemmed | Simulating the giant magnetocaloric effect-from mean-field theory to microscopic models |
| title_short | Simulating the giant magnetocaloric effect-from mean-field theory to microscopic models |
| title_sort | simulating the giant magnetocaloric effect from mean field theory to microscopic models |
| topic | magnetic materials magnetic refrigeration energy harvesting first-order phase transitions magnetovolume coupling |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2023.1037396/full |
| work_keys_str_mv | AT jsamaral simulatingthegiantmagnetocaloriceffectfrommeanfieldtheorytomicroscopicmodels AT vsamaral simulatingthegiantmagnetocaloriceffectfrommeanfieldtheorytomicroscopicmodels |