S. Ait Bouzid, N. Elhamouchi, M. Sajieddine, O. Aitmellal, V. Kuncser, A. C. Galca, N. Iacob, M. Enculescu, A. Essoumhi
{"title":"La0.9K0.1MnO3 和 La0.8K0.1Pb0.1MnO3 块状包晶锰酸盐的磁致性质","authors":"S. Ait Bouzid, N. Elhamouchi, M. Sajieddine, O. Aitmellal, V. Kuncser, A. C. Galca, N. Iacob, M. Enculescu, A. Essoumhi","doi":"10.1007/s10854-024-13873-x","DOIUrl":null,"url":null,"abstract":"<div><p>In the present work, we report the synthesis and investigations of La<sub>0.9</sub>K<sub>0.1</sub>MnO<sub>3</sub> and La<sub>0.8</sub>K<sub>0.1</sub>Pb<sub>0.1</sub>MnO<sub>3</sub> bulk samples which could be potential magnetocaloric materials for magnetic refrigeration close to room temperature. A flash combustion reaction and sintering at 1200 °C for 10 h are used to prepare the bulk materials. Both compounds crystallized into a rhombohedral structure with R<span>\\(\\overline{3 }\\)</span>c space group confirmed by X-ray powder diffraction results. Scanning electron microscopy analysis, combined with XRD peak profiles is performed to estimate the particle/crystallite size of the samples. Moreover, the Curie temperature, T<sub>C</sub>, is found to be higher in lead-rich sample due to the enhancement of the grain size and the Mn<sup>3+</sup>–O–Mn<sup>4+</sup> double exchange (DE) interaction. Therefore, the bulk sample La<sub>0.8</sub>K<sub>0.1</sub>Pb<sub>0.1</sub>MnO<sub>3</sub> shows a room temperature phase transition of 289 K as well as a higher saturation magnetization. The La<sub>0.8</sub>K<sub>0.1</sub>Pb<sub>0.1</sub>MnO<sub>3</sub> bulk compound exhibits a high and sharp peak in magnetic entropy change up to 5.5 Jkg<sup>−1</sup> K<sup>−1</sup> under 5 T at the magnetic transition temperature T<sub>C</sub>. To compare the magnetocaloric performances of the studied compounds, relative cooling power (RCP) was employed. The obtained experimental results revealed that the increase in particle size influences severely the magnetocaloric properties.</p></div>","PeriodicalId":646,"journal":{"name":"Journal of Materials Science: Materials in Electronics","volume":"35 33","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Magnetocaloric properties of La0.9K0.1MnO3 and La0.8K0.1Pb0.1MnO3 bulk perovskite manganites\",\"authors\":\"S. Ait Bouzid, N. Elhamouchi, M. Sajieddine, O. Aitmellal, V. Kuncser, A. C. Galca, N. Iacob, M. Enculescu, A. Essoumhi\",\"doi\":\"10.1007/s10854-024-13873-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>In the present work, we report the synthesis and investigations of La<sub>0.9</sub>K<sub>0.1</sub>MnO<sub>3</sub> and La<sub>0.8</sub>K<sub>0.1</sub>Pb<sub>0.1</sub>MnO<sub>3</sub> bulk samples which could be potential magnetocaloric materials for magnetic refrigeration close to room temperature. A flash combustion reaction and sintering at 1200 °C for 10 h are used to prepare the bulk materials. Both compounds crystallized into a rhombohedral structure with R<span>\\\\(\\\\overline{3 }\\\\)</span>c space group confirmed by X-ray powder diffraction results. Scanning electron microscopy analysis, combined with XRD peak profiles is performed to estimate the particle/crystallite size of the samples. Moreover, the Curie temperature, T<sub>C</sub>, is found to be higher in lead-rich sample due to the enhancement of the grain size and the Mn<sup>3+</sup>–O–Mn<sup>4+</sup> double exchange (DE) interaction. Therefore, the bulk sample La<sub>0.8</sub>K<sub>0.1</sub>Pb<sub>0.1</sub>MnO<sub>3</sub> shows a room temperature phase transition of 289 K as well as a higher saturation magnetization. The La<sub>0.8</sub>K<sub>0.1</sub>Pb<sub>0.1</sub>MnO<sub>3</sub> bulk compound exhibits a high and sharp peak in magnetic entropy change up to 5.5 Jkg<sup>−1</sup> K<sup>−1</sup> under 5 T at the magnetic transition temperature T<sub>C</sub>. To compare the magnetocaloric performances of the studied compounds, relative cooling power (RCP) was employed. The obtained experimental results revealed that the increase in particle size influences severely the magnetocaloric properties.</p></div>\",\"PeriodicalId\":646,\"journal\":{\"name\":\"Journal of Materials Science: Materials in Electronics\",\"volume\":\"35 33\",\"pages\":\"\"},\"PeriodicalIF\":2.8000,\"publicationDate\":\"2024-11-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Science: Materials in Electronics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10854-024-13873-x\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science: Materials in Electronics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10854-024-13873-x","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Magnetocaloric properties of La0.9K0.1MnO3 and La0.8K0.1Pb0.1MnO3 bulk perovskite manganites
In the present work, we report the synthesis and investigations of La0.9K0.1MnO3 and La0.8K0.1Pb0.1MnO3 bulk samples which could be potential magnetocaloric materials for magnetic refrigeration close to room temperature. A flash combustion reaction and sintering at 1200 °C for 10 h are used to prepare the bulk materials. Both compounds crystallized into a rhombohedral structure with R\(\overline{3 }\)c space group confirmed by X-ray powder diffraction results. Scanning electron microscopy analysis, combined with XRD peak profiles is performed to estimate the particle/crystallite size of the samples. Moreover, the Curie temperature, TC, is found to be higher in lead-rich sample due to the enhancement of the grain size and the Mn3+–O–Mn4+ double exchange (DE) interaction. Therefore, the bulk sample La0.8K0.1Pb0.1MnO3 shows a room temperature phase transition of 289 K as well as a higher saturation magnetization. The La0.8K0.1Pb0.1MnO3 bulk compound exhibits a high and sharp peak in magnetic entropy change up to 5.5 Jkg−1 K−1 under 5 T at the magnetic transition temperature TC. To compare the magnetocaloric performances of the studied compounds, relative cooling power (RCP) was employed. The obtained experimental results revealed that the increase in particle size influences severely the magnetocaloric properties.
期刊介绍：
The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.
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