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| DOI | 10.1088/2515-7655/ad1c61 |
| Rotating magnetocaloric effect in polycrystals-harnessing the demagnetizing effect | |
| Almeida, R.; Freitas, S. C.; Fernandes, C. R.; Kiefe, R.; Araujo, J. P.; Amaral, J. S.; Ventura, J. O.; Belo, J. H.; Silva, D. J. | |
| 发表日期 | 2024 |
| ISSN | 2515-7655 |
| 起始页码 | 6 |
| 结束页码 | 1 |
| 卷号 | 6期号:1 |
| 英文摘要 | Climate change and the increasing demand for energy globally have motivated the search for a more sustainable heat-pumping technology. Magnetic refrigeration stands as one of the most promising alternative technologies for clean and efficient heat pumps of the future. The rotating magnetocaloric effect (RMCE) has previously been studied in materials with magnetocrystalline anisotropy due to its potential to improve devices by requiring only a single magnetic field region, but these materials are fragile and costly to obtain, making them inviable for applications. It has been shown that by exploiting the demagnetizing effect, an RMCE is, in fact, attainable in any polycrystalline magnetocaloric sample with an asymmetric shape, without requiring magnetocrystalline anisotropy. Using gadolinium as a case study, we provide a theoretical framework for computing the demagnetizing field-based RMCE and present thorough experimental verification for different magnetic field intensities and a wide temperature range. Direct measurements of the RMCE in gadolinium reveal that a significant adiabatic temperature difference (1.2 K) and refrigerant capacity (7.44 J kg-1) can be attained within low magnetic field amplitudes (0.4 T). Utilizing lower magnetic field intensities in a magnetocaloric heat pump can significantly diminish the need for permanent magnet materials, thus reducing the overall device cost, size, and weight, ultimately enhancing the feasibility of mass-producing such devices. |
| 英文关键词 | rotating magnetocaloric effect; demagnetizing effect; refrigeration; magnetic cooling |
| 语种 | 英语 |
| WOS研究方向 | Energy & Fuels ; Materials Science |
| WOS类目 | Energy & Fuels ; Materials Science, Multidisciplinary |
| WOS记录号 | WOS:001144948400001 |
| 来源期刊 | JOURNAL OF PHYSICS-ENERGY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/295056 |
| 作者单位 | Universidade do Porto; Universidade de Aveiro; Universidade de Aveiro |
| 推荐引用方式 GB/T 7714 | Almeida, R.,Freitas, S. C.,Fernandes, C. R.,et al. Rotating magnetocaloric effect in polycrystals-harnessing the demagnetizing effect[J],2024,6(1). |
| APA | Almeida, R..,Freitas, S. C..,Fernandes, C. R..,Kiefe, R..,Araujo, J. P..,...&Silva, D. J..(2024).Rotating magnetocaloric effect in polycrystals-harnessing the demagnetizing effect.JOURNAL OF PHYSICS-ENERGY,6(1). |
| MLA | Almeida, R.,et al."Rotating magnetocaloric effect in polycrystals-harnessing the demagnetizing effect".JOURNAL OF PHYSICS-ENERGY 6.1(2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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