{"title":"退火处理对多晶 YBa2Cu3-Fe O7- 结构和超导特性的影响","authors":"","doi":"10.1016/j.physc.2024.1354570","DOIUrl":null,"url":null,"abstract":"<div><p>The influence of annealing treatments on the crystal structure and superconducting properties of polycrystalline YBa<sub>2</sub>Cu<sub>3-</sub><em><sub>x</sub></em>Fe<em><sub>x</sub></em>O<sub>7-</sub><em><sub>δ</sub></em> has been estimated. The Fe elements was doped into Cu sites in polycrystalline YBa<sub>2</sub>Cu<sub>3-</sub><em><sub>x</sub></em>Fe<em><sub>x</sub></em>O<sub>7-</sub><em><sub>δ</sub></em> for 0.0 ≤ <em>x</em> ≤ 0.4. All of samples were annealed under different atmospheres: a low-oxygen-pressure atmosphere in flowing oxygen and a high-oxygen-pressure ambient. The local structure, magnetization, and electrical transport properties have been compared for the two series of samples before and after annealing. The lattice constants and <em>T</em><sub>c</sub> have been shown as a function of iron concentration for samples, indicating that the polycrystalline YBa<sub>2</sub>Cu<sub>3-</sub><em><sub>x</sub></em>Fe<em><sub>x</sub></em>O<sub>7-</sub><em><sub>δ</sub></em> materials display a structural transition from orthorhombic to tetragonal phase with increasing Fe concentration. Compared to as-synthesized samples, the annealed samples achieve a higher <em>T</em><sub>c</sub>. Furthermore, the YBa<sub>2</sub>Cu<sub>3-</sub><em><sub>x</sub></em>Fe<em><sub>x</sub></em>O<sub>7-</sub><em><sub>δ</sub></em> samples with <em>x</em> = 0.2, 0.3, 0.4 undergo from non-superconducting state to superconducting state after annealing.</p></div>","PeriodicalId":20159,"journal":{"name":"Physica C-superconductivity and Its Applications","volume":null,"pages":null},"PeriodicalIF":1.3000,"publicationDate":"2024-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effects of annealing treatments on the structure and superconducting properties of polycrystalline YBa2Cu3-xFexO7-δ\",\"authors\":\"\",\"doi\":\"10.1016/j.physc.2024.1354570\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The influence of annealing treatments on the crystal structure and superconducting properties of polycrystalline YBa<sub>2</sub>Cu<sub>3-</sub><em><sub>x</sub></em>Fe<em><sub>x</sub></em>O<sub>7-</sub><em><sub>δ</sub></em> has been estimated. The Fe elements was doped into Cu sites in polycrystalline YBa<sub>2</sub>Cu<sub>3-</sub><em><sub>x</sub></em>Fe<em><sub>x</sub></em>O<sub>7-</sub><em><sub>δ</sub></em> for 0.0 ≤ <em>x</em> ≤ 0.4. All of samples were annealed under different atmospheres: a low-oxygen-pressure atmosphere in flowing oxygen and a high-oxygen-pressure ambient. The local structure, magnetization, and electrical transport properties have been compared for the two series of samples before and after annealing. The lattice constants and <em>T</em><sub>c</sub> have been shown as a function of iron concentration for samples, indicating that the polycrystalline YBa<sub>2</sub>Cu<sub>3-</sub><em><sub>x</sub></em>Fe<em><sub>x</sub></em>O<sub>7-</sub><em><sub>δ</sub></em> materials display a structural transition from orthorhombic to tetragonal phase with increasing Fe concentration. Compared to as-synthesized samples, the annealed samples achieve a higher <em>T</em><sub>c</sub>. Furthermore, the YBa<sub>2</sub>Cu<sub>3-</sub><em><sub>x</sub></em>Fe<em><sub>x</sub></em>O<sub>7-</sub><em><sub>δ</sub></em> samples with <em>x</em> = 0.2, 0.3, 0.4 undergo from non-superconducting state to superconducting state after annealing.</p></div>\",\"PeriodicalId\":20159,\"journal\":{\"name\":\"Physica C-superconductivity and Its Applications\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2024-07-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Physica C-superconductivity and Its Applications\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0921453424001345\",\"RegionNum\":3,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"PHYSICS, APPLIED\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physica C-superconductivity and Its Applications","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0921453424001345","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, APPLIED","Score":null,"Total":0}
Effects of annealing treatments on the structure and superconducting properties of polycrystalline YBa2Cu3-xFexO7-δ
The influence of annealing treatments on the crystal structure and superconducting properties of polycrystalline YBa2Cu3-xFexO7-δ has been estimated. The Fe elements was doped into Cu sites in polycrystalline YBa2Cu3-xFexO7-δ for 0.0 ≤ x ≤ 0.4. All of samples were annealed under different atmospheres: a low-oxygen-pressure atmosphere in flowing oxygen and a high-oxygen-pressure ambient. The local structure, magnetization, and electrical transport properties have been compared for the two series of samples before and after annealing. The lattice constants and Tc have been shown as a function of iron concentration for samples, indicating that the polycrystalline YBa2Cu3-xFexO7-δ materials display a structural transition from orthorhombic to tetragonal phase with increasing Fe concentration. Compared to as-synthesized samples, the annealed samples achieve a higher Tc. Furthermore, the YBa2Cu3-xFexO7-δ samples with x = 0.2, 0.3, 0.4 undergo from non-superconducting state to superconducting state after annealing.
期刊介绍：
Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity.
The main goal of the journal is to publish:
1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods.
2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance.
3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices.
The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.
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