Mehmet Selim Aslan, Gönül Akça, Selda Kılıç Çetin, Ahmet Ekicibil
{"title":"对 La0.7Ca0.27Na0.03Mn1-xBixO3（x = 0.0、0.005、0.01 和 0.02）包晶中掺入 Bi 的磁致性的研究","authors":"Mehmet Selim Aslan, Gönül Akça, Selda Kılıç Çetin, Ahmet Ekicibil","doi":"10.1016/j.mseb.2024.117760","DOIUrl":null,"url":null,"abstract":"<div><div>In the present study, the effects of Bi doping on the Mn-site of La<sub>0.7</sub>Ca<sub>0.27</sub>Na<sub>0.03</sub>Mn<sub>1-x</sub>Bi<sub>x</sub>O<sub>3</sub> perovskite manganites on their structural, magnetic, and magnetocaloric properties were investigated. From XRD analyses, the main La<sub>0.7</sub>Ca<sub>0.27</sub>Na<sub>0.03</sub>MnO<sub>3</sub> manganite has a rhombohedral structure with space group <span><math><mrow><mi>R</mi><mover><mrow><mn>3</mn></mrow><mrow><mo>¯</mo></mrow></mover><mi>c</mi></mrow></math></span>. In contrast, manganites obtained by doping with x = 0.005, 0.01, and 0.02 Bi were found to have an orthorhombic structure with space group <em>Pnma</em>. The Curie temperature (<em>T<sub>C</sub></em>) is 310, 246, 235, and 232 K for x = 0.0, 0.005, 0.01 and 0.02, respectively. The maximum entropy change (<span><math><mrow><mo>-</mo><mi>Δ</mi><msubsup><mi>S</mi><mrow><mi>M</mi></mrow><mrow><mi>max</mi></mrow></msubsup><mrow><mo>)</mo></mrow></mrow></math></span> values were calculated as 6.34, 8.24, 8.33, and 8.42 Jkg<sup>-1</sup>K<sup>−1</sup> for x = 0.0, 0.005, 0.01 and 0.02, respectively. The highest Relative Cooling Power (RCP) value was computed as 271 Jkg<sup>−1</sup> for the sample with a Bi concentration of 0.01. It was determined from the <em>H/M</em> versus <em>M<sup>2</sup></em> curves that all samples displayed a second-order magnetic phase transition.</div></div>","PeriodicalId":18233,"journal":{"name":"Materials Science and Engineering B-advanced Functional Solid-state Materials","volume":"310 ","pages":"Article 117760"},"PeriodicalIF":3.9000,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Investigation of the magnetocaloric properties of Bi doping in La0.7Ca0.27Na0.03Mn1-xBixO3 (x = 0.0, 0.005, 0.01 and 0.02) perovskites\",\"authors\":\"Mehmet Selim Aslan, Gönül Akça, Selda Kılıç Çetin, Ahmet Ekicibil\",\"doi\":\"10.1016/j.mseb.2024.117760\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>In the present study, the effects of Bi doping on the Mn-site of La<sub>0.7</sub>Ca<sub>0.27</sub>Na<sub>0.03</sub>Mn<sub>1-x</sub>Bi<sub>x</sub>O<sub>3</sub> perovskite manganites on their structural, magnetic, and magnetocaloric properties were investigated. From XRD analyses, the main La<sub>0.7</sub>Ca<sub>0.27</sub>Na<sub>0.03</sub>MnO<sub>3</sub> manganite has a rhombohedral structure with space group <span><math><mrow><mi>R</mi><mover><mrow><mn>3</mn></mrow><mrow><mo>¯</mo></mrow></mover><mi>c</mi></mrow></math></span>. In contrast, manganites obtained by doping with x = 0.005, 0.01, and 0.02 Bi were found to have an orthorhombic structure with space group <em>Pnma</em>. The Curie temperature (<em>T<sub>C</sub></em>) is 310, 246, 235, and 232 K for x = 0.0, 0.005, 0.01 and 0.02, respectively. The maximum entropy change (<span><math><mrow><mo>-</mo><mi>Δ</mi><msubsup><mi>S</mi><mrow><mi>M</mi></mrow><mrow><mi>max</mi></mrow></msubsup><mrow><mo>)</mo></mrow></mrow></math></span> values were calculated as 6.34, 8.24, 8.33, and 8.42 Jkg<sup>-1</sup>K<sup>−1</sup> for x = 0.0, 0.005, 0.01 and 0.02, respectively. The highest Relative Cooling Power (RCP) value was computed as 271 Jkg<sup>−1</sup> for the sample with a Bi concentration of 0.01. It was determined from the <em>H/M</em> versus <em>M<sup>2</sup></em> curves that all samples displayed a second-order magnetic phase transition.</div></div>\",\"PeriodicalId\":18233,\"journal\":{\"name\":\"Materials Science and Engineering B-advanced Functional Solid-state Materials\",\"volume\":\"310 \",\"pages\":\"Article 117760\"},\"PeriodicalIF\":3.9000,\"publicationDate\":\"2024-10-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Materials Science and Engineering B-advanced Functional Solid-state Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0921510724005890\",\"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":"Materials Science and Engineering B-advanced Functional Solid-state Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921510724005890","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}
Investigation of the magnetocaloric properties of Bi doping in La0.7Ca0.27Na0.03Mn1-xBixO3 (x = 0.0, 0.005, 0.01 and 0.02) perovskites
In the present study, the effects of Bi doping on the Mn-site of La0.7Ca0.27Na0.03Mn1-xBixO3 perovskite manganites on their structural, magnetic, and magnetocaloric properties were investigated. From XRD analyses, the main La0.7Ca0.27Na0.03MnO3 manganite has a rhombohedral structure with space group . In contrast, manganites obtained by doping with x = 0.005, 0.01, and 0.02 Bi were found to have an orthorhombic structure with space group Pnma. The Curie temperature (TC) is 310, 246, 235, and 232 K for x = 0.0, 0.005, 0.01 and 0.02, respectively. The maximum entropy change ( values were calculated as 6.34, 8.24, 8.33, and 8.42 Jkg-1K−1 for x = 0.0, 0.005, 0.01 and 0.02, respectively. The highest Relative Cooling Power (RCP) value was computed as 271 Jkg−1 for the sample with a Bi concentration of 0.01. It was determined from the H/M versus M2 curves that all samples displayed a second-order magnetic phase transition.
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