2021 Fiscal Year Final Research Report
Elucidation of coexistence between superconductivity and magnetic order using rutheno-cuprate magnetic superconductor single crystal
| Project/Area Number |
18K04921
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 29010:Applied physical properties-related
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| Research Institution | Utsunomiya University |
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Principal Investigator |
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| Project Period (FY) |
2018-04-01 – 2022-03-31
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| Keywords | 銅酸化物高温超伝導体 / 単結晶 / 構造解析 / 部分溶融 / 磁性超伝導体 / ルテニウム化合物 |
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| Outline of Final Research Achievements |
We have succeeded in establishing a method for synthesizing rutheno-cuprates single crystals with a size of 100 micrometres in length. The structural analysis of the single-crystal samples revealed that superconductivity is inhibited by two factors: (1) Ru substitutions on the superconducting CuO2 planes and (2) rare earth substitutions on the Sr sites in the blocking layer. Furthermore, we succeeded in synthesizing a single crystal of the RuRE-1222 system with two rare earth layers inserted between the superconducting planes.
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| Free Research Field |
ルテニウム系銅酸化物高温超伝導体
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| Academic Significance and Societal Importance of the Research Achievements |
本研究課題により，分解溶融型の複合酸化物でルテニウム元素の昇華性もあり極めて合成の難しいルテニウム系銅酸化物の微小単結晶試料の合成手法を確立することに成功しました．この成果は他の蒸気圧の高い材料や分解溶融型物質の単結晶成長に関して新たな合成経路を提供するもので，多くの類型化合物への展開が期待できます．更に単結晶試料を用いた精密物性測定によってルテニウム系銅酸化物の超伝導機構の解明が進みました．
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