{"title":"150 ~ 225k制冷用La2/3-xEuxCa1/3MnO3锰铁磁性材料","authors":"Binlong Pan, Huafu Chen, Xiang Li, Nengjun Yu, Minxiang Pan, Yundan Yu, Jieyang Fang, Qiong Wu, Hangfu Yang, Hongliang Ge","doi":"10.1007/s10948-023-06517-4","DOIUrl":null,"url":null,"abstract":"<div><h2>Abstract\n</h2><div><p>The phase structure and magnetic and magnetocaloric effect (MCE) properties have been studied in La<sub>2/3-x</sub>Eu<sub>x</sub>Ca<sub>1/3</sub>MnO<sub>3</sub> (0 ≤ x ≤ 0.08) manganites prepared by conventional solid-state reaction. There is no miscellaneous phase in the samples, which are analyzed by the Rietveld refinement method. The refinement data shows the lattice decreases gradually with smaller radius of Eu<sup>3+</sup> substitution. The Curie temperature of the material is continuity distributed from 150 to 225 K. Large magnetic entropy changes (Δ<i>S</i><sub>M</sub>) are obtained with Eu<sup>3+</sup> substitution, the highest value of −Δ<i>S</i><sub>M</sub> is 4.93 J·kg<sup>−1</sup> K<sup>−1</sup> in the magnetic field change at 2 T, and the relative cooling power (RCP) value is around ~ 110 J·kg<sup>−1</sup>. The samples undergo a first-order magnetic phase transition with small hysteresis, for <i>x</i> = 0.00, 0.02, when <i>x</i> ≥ 0.4, the samples under a second-order magnetic phase transition. The results show that the substitution of Eu<sup>3+</sup> can be used to modify the Curie temperature and obtain a continuous operating temperature interval, without sacrificing the MCE. The large MCE performance, continuous working temperature interval, and high cooling efficiency make our samples be used for the application of magnetic refrigeration.</p></div></div>","PeriodicalId":669,"journal":{"name":"Journal of Superconductivity and Novel Magnetism","volume":"36 3","pages":"939 - 949"},"PeriodicalIF":1.6000,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10948-023-06517-4.pdf","citationCount":"0","resultStr":"{\"title\":\"Magnetic Materials of La2/3-xEuxCa1/3MnO3 Manganites for the Refrigeration Application from 150 to 225 K\",\"authors\":\"Binlong Pan, Huafu Chen, Xiang Li, Nengjun Yu, Minxiang Pan, Yundan Yu, Jieyang Fang, Qiong Wu, Hangfu Yang, Hongliang Ge\",\"doi\":\"10.1007/s10948-023-06517-4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h2>Abstract\\n</h2><div><p>The phase structure and magnetic and magnetocaloric effect (MCE) properties have been studied in La<sub>2/3-x</sub>Eu<sub>x</sub>Ca<sub>1/3</sub>MnO<sub>3</sub> (0 ≤ x ≤ 0.08) manganites prepared by conventional solid-state reaction. There is no miscellaneous phase in the samples, which are analyzed by the Rietveld refinement method. The refinement data shows the lattice decreases gradually with smaller radius of Eu<sup>3+</sup> substitution. The Curie temperature of the material is continuity distributed from 150 to 225 K. Large magnetic entropy changes (Δ<i>S</i><sub>M</sub>) are obtained with Eu<sup>3+</sup> substitution, the highest value of −Δ<i>S</i><sub>M</sub> is 4.93 J·kg<sup>−1</sup> K<sup>−1</sup> in the magnetic field change at 2 T, and the relative cooling power (RCP) value is around ~ 110 J·kg<sup>−1</sup>. The samples undergo a first-order magnetic phase transition with small hysteresis, for <i>x</i> = 0.00, 0.02, when <i>x</i> ≥ 0.4, the samples under a second-order magnetic phase transition. The results show that the substitution of Eu<sup>3+</sup> can be used to modify the Curie temperature and obtain a continuous operating temperature interval, without sacrificing the MCE. The large MCE performance, continuous working temperature interval, and high cooling efficiency make our samples be used for the application of magnetic refrigeration.</p></div></div>\",\"PeriodicalId\":669,\"journal\":{\"name\":\"Journal of Superconductivity and Novel Magnetism\",\"volume\":\"36 3\",\"pages\":\"939 - 949\"},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2023-03-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10948-023-06517-4.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Superconductivity and Novel Magnetism\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10948-023-06517-4\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"PHYSICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Superconductivity and Novel Magnetism","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s10948-023-06517-4","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
Magnetic Materials of La2/3-xEuxCa1/3MnO3 Manganites for the Refrigeration Application from 150 to 225 K
Abstract
The phase structure and magnetic and magnetocaloric effect (MCE) properties have been studied in La2/3-xEuxCa1/3MnO3 (0 ≤ x ≤ 0.08) manganites prepared by conventional solid-state reaction. There is no miscellaneous phase in the samples, which are analyzed by the Rietveld refinement method. The refinement data shows the lattice decreases gradually with smaller radius of Eu3+ substitution. The Curie temperature of the material is continuity distributed from 150 to 225 K. Large magnetic entropy changes (ΔSM) are obtained with Eu3+ substitution, the highest value of −ΔSM is 4.93 J·kg−1 K−1 in the magnetic field change at 2 T, and the relative cooling power (RCP) value is around ~ 110 J·kg−1. The samples undergo a first-order magnetic phase transition with small hysteresis, for x = 0.00, 0.02, when x ≥ 0.4, the samples under a second-order magnetic phase transition. The results show that the substitution of Eu3+ can be used to modify the Curie temperature and obtain a continuous operating temperature interval, without sacrificing the MCE. The large MCE performance, continuous working temperature interval, and high cooling efficiency make our samples be used for the application of magnetic refrigeration.
期刊介绍：
The Journal of Superconductivity and Novel Magnetism serves as the international forum for the most current research and ideas in these fields. This highly acclaimed journal publishes peer-reviewed original papers, conference proceedings and invited review articles that examine all aspects of the science and technology of superconductivity, including new materials, new mechanisms, basic and technological properties, new phenomena, and small- and large-scale applications. Novel magnetism, which is expanding rapidly, is also featured in the journal. The journal focuses on such areas as spintronics, magnetic semiconductors, properties of magnetic multilayers, magnetoresistive materials and structures, magnetic oxides, etc. Novel superconducting and magnetic materials are complex compounds, and the journal publishes articles related to all aspects their study, such as sample preparation, spectroscopy and transport properties as well as various applications.
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