{"title":"聚苯树枝状聚合物双层膜的磁特性和磁致效应：与各种非磁层的 RKKY 交换相互作用","authors":"","doi":"10.1016/j.commatsci.2024.113338","DOIUrl":null,"url":null,"abstract":"<div><p>In the present article, Monte Carlo simulations were used to investigate the magnetic properties and magnetocaloric effetc of Polyphenylene Dendrimers bilayers under the Ruderman-Kittel-Kasuya-Yosida exchange interactions, considering mixed spins S = 5/2 and σ = 2. The phases of the ground state at zero temperature are explained in more detail. Additionally, we analyze the effects of varying the number of non-magnetic layers (NML), reduced exchange interactions between the two first nearest neighbors of spins S-S (R<sub>SS</sub>), between spins σ-σ (R<sub>σσ</sub>), and reduced crystal field (d) on the total magnetization and hysteresis loops. Besides, the parameters NML, R<sub>SS</sub>, R<sub>σσ</sub>, and d were varied to determine the reduced critical temperature. The impact of different reduced external magnetic fields (h/J<sub>Sσ</sub>) on specific heat, magnetic entropy changes, and adiabatic temperature changes was studied as functions of reduced temperature. Finally, we have examined the relative cooling power (RCP) for several parameters h/J<sub>Sσ</sub>.</p></div>","PeriodicalId":10650,"journal":{"name":"Computational Materials Science","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Magnetic characteristics and magnetocaloric effect of polyphenylene dendrimer bilayers: RKKY exchange interactions with a variety of non-magnetic layers\",\"authors\":\"\",\"doi\":\"10.1016/j.commatsci.2024.113338\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the present article, Monte Carlo simulations were used to investigate the magnetic properties and magnetocaloric effetc of Polyphenylene Dendrimers bilayers under the Ruderman-Kittel-Kasuya-Yosida exchange interactions, considering mixed spins S = 5/2 and σ = 2. The phases of the ground state at zero temperature are explained in more detail. Additionally, we analyze the effects of varying the number of non-magnetic layers (NML), reduced exchange interactions between the two first nearest neighbors of spins S-S (R<sub>SS</sub>), between spins σ-σ (R<sub>σσ</sub>), and reduced crystal field (d) on the total magnetization and hysteresis loops. Besides, the parameters NML, R<sub>SS</sub>, R<sub>σσ</sub>, and d were varied to determine the reduced critical temperature. The impact of different reduced external magnetic fields (h/J<sub>Sσ</sub>) on specific heat, magnetic entropy changes, and adiabatic temperature changes was studied as functions of reduced temperature. Finally, we have examined the relative cooling power (RCP) for several parameters h/J<sub>Sσ</sub>.</p></div>\",\"PeriodicalId\":10650,\"journal\":{\"name\":\"Computational Materials Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-09-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Computational Materials Science\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0927025624005597\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computational Materials Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0927025624005597","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Magnetic characteristics and magnetocaloric effect of polyphenylene dendrimer bilayers: RKKY exchange interactions with a variety of non-magnetic layers
In the present article, Monte Carlo simulations were used to investigate the magnetic properties and magnetocaloric effetc of Polyphenylene Dendrimers bilayers under the Ruderman-Kittel-Kasuya-Yosida exchange interactions, considering mixed spins S = 5/2 and σ = 2. The phases of the ground state at zero temperature are explained in more detail. Additionally, we analyze the effects of varying the number of non-magnetic layers (NML), reduced exchange interactions between the two first nearest neighbors of spins S-S (RSS), between spins σ-σ (Rσσ), and reduced crystal field (d) on the total magnetization and hysteresis loops. Besides, the parameters NML, RSS, Rσσ, and d were varied to determine the reduced critical temperature. The impact of different reduced external magnetic fields (h/JSσ) on specific heat, magnetic entropy changes, and adiabatic temperature changes was studied as functions of reduced temperature. Finally, we have examined the relative cooling power (RCP) for several parameters h/JSσ.
期刊介绍：
The goal of Computational Materials Science is to report on results that provide new or unique insights into, or significantly expand our understanding of, the properties of materials or phenomena associated with their design, synthesis, processing, characterization, and utilization. To be relevant to the journal, the results should be applied or applicable to specific material systems that are discussed within the submission.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
