期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 133, 期 25, 页码 9630-9633出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja110729m
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资金
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) [20001004]
- Grants-in-Aid for Scientific Research [22540380, 20001004] Funding Source: KAKEN
Using a high-pressure technique, we have successfully synthesized (Ca3Al2O5-y)(Fe(2)Pn(2)) (Pn = As and P), the first iron-based superconductors with the perovskite-based 32522 structure to be reported. The transition temperature (T-c) is 30.2 K for Pn = As and 16.6 K for Pn = P. The emergence of superconductivity is ascribed to the small tetragonal a-axis lattice constant of the materials. From these results, an empirical relationship is established between the a-axis lattice constant and T, in iron-based superconductors, which offers a practical guideline for exploring new superconductors with higher T-c.
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