{"title":"C20富勒烯结构的磁性和磁热学性质：蒙特卡罗研究","authors":"A. Jabar, S. Benyoussef, L. Bahmad","doi":"10.1007/s10825-025-02368-5","DOIUrl":null,"url":null,"abstract":"<div><p>One of the most active classes of nanostructures is fullerene C<sub>20</sub>, which has been exploited as an active component in significant applications. In this investigation, Monte Carlo simulation is used to investigate the magnetic and magnetocaloric properties of the mixed spins 2 and 3/2 fullerene C<sub>20</sub> system. Ferrimagnetic and ferromagnetic phases are stable, according to the ground state phase diagrams that have been constructed. The behavior of the magnetizations and the derivative of magnetization, in particular, have shown the impact of rising temperature. Additionally, an increase of the reduced Curie temperature to approximately t<sub>C</sub> ≈ 3 was observed when the interactions between the spins S were strengthened. For numerous reduced external magnetic fields and reduced temperatures, the magnetic entropy variations are studied. The Relative Cooling Power (RCP) is calculated. It is demonstrated that the reduced exchange coupling interactions, <i>p</i> and <i>r</i>, lead to an increase in the reduced magnetic coercive field.</p></div>","PeriodicalId":620,"journal":{"name":"Journal of Computational Electronics","volume":"24 4","pages":""},"PeriodicalIF":2.5000,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Magnetic and magnetocaloric properties of a C20 fullerene structure: Monte Carlo study\",\"authors\":\"A. Jabar, S. Benyoussef, L. Bahmad\",\"doi\":\"10.1007/s10825-025-02368-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>One of the most active classes of nanostructures is fullerene C<sub>20</sub>, which has been exploited as an active component in significant applications. In this investigation, Monte Carlo simulation is used to investigate the magnetic and magnetocaloric properties of the mixed spins 2 and 3/2 fullerene C<sub>20</sub> system. Ferrimagnetic and ferromagnetic phases are stable, according to the ground state phase diagrams that have been constructed. The behavior of the magnetizations and the derivative of magnetization, in particular, have shown the impact of rising temperature. Additionally, an increase of the reduced Curie temperature to approximately t<sub>C</sub> ≈ 3 was observed when the interactions between the spins S were strengthened. For numerous reduced external magnetic fields and reduced temperatures, the magnetic entropy variations are studied. The Relative Cooling Power (RCP) is calculated. It is demonstrated that the reduced exchange coupling interactions, <i>p</i> and <i>r</i>, lead to an increase in the reduced magnetic coercive field.</p></div>\",\"PeriodicalId\":620,\"journal\":{\"name\":\"Journal of Computational Electronics\",\"volume\":\"24 4\",\"pages\":\"\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-06-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Computational Electronics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10825-025-02368-5\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Computational Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10825-025-02368-5","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Magnetic and magnetocaloric properties of a C20 fullerene structure: Monte Carlo study
One of the most active classes of nanostructures is fullerene C20, which has been exploited as an active component in significant applications. In this investigation, Monte Carlo simulation is used to investigate the magnetic and magnetocaloric properties of the mixed spins 2 and 3/2 fullerene C20 system. Ferrimagnetic and ferromagnetic phases are stable, according to the ground state phase diagrams that have been constructed. The behavior of the magnetizations and the derivative of magnetization, in particular, have shown the impact of rising temperature. Additionally, an increase of the reduced Curie temperature to approximately tC ≈ 3 was observed when the interactions between the spins S were strengthened. For numerous reduced external magnetic fields and reduced temperatures, the magnetic entropy variations are studied. The Relative Cooling Power (RCP) is calculated. It is demonstrated that the reduced exchange coupling interactions, p and r, lead to an increase in the reduced magnetic coercive field.
期刊介绍：
he Journal of Computational Electronics brings together research on all aspects of modeling and simulation of modern electronics. This includes optical, electronic, mechanical, and quantum mechanical aspects, as well as research on the underlying mathematical algorithms and computational details. The related areas of energy conversion/storage and of molecular and biological systems, in which the thrust is on the charge transport, electronic, mechanical, and optical properties, are also covered.
In particular, we encourage manuscripts dealing with device simulation; with optical and optoelectronic systems and photonics; with energy storage (e.g. batteries, fuel cells) and harvesting (e.g. photovoltaic), with simulation of circuits, VLSI layout, logic and architecture (based on, for example, CMOS devices, quantum-cellular automata, QBITs, or single-electron transistors); with electromagnetic simulations (such as microwave electronics and components); or with molecular and biological systems. However, in all these cases, the submitted manuscripts should explicitly address the electronic properties of the relevant systems, materials, or devices and/or present novel contributions to the physical models, computational strategies, or numerical algorithms.
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