Molecules | |
Superconducting Fullerene Nanowhiskers | |
Hiroyuki Takeya1  Kun’ichi Miyazawa1  Ryoei Kato1  Takatsugu Wakahara1  Toshinori Ozaki1  Hiroyuki Okazaki1  Takahide Yamaguchi1  | |
[1] 1National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan 2Transformative Research Project on Iron Pnictides (TRIP), Japan Science and Technology Agency, Chiyoda-ku, Tokyo 102-0075, Japan | |
关键词: fullerene nanowhisker; superconductor; potassium intercalation; | |
DOI : 10.3390/molecules17054851 | |
来源: mdpi | |
【 摘 要 】
We synthesized superconducting fullerene nanowhiskers (C60NWs) by potassium (K) intercalation. They showed large superconducting volume fractions, as high as 80%. The superconducting transition temperature at 17 K was independent of the K content (x) in the range between 1.6 and 6.0 in K-doped C60 nanowhiskers (KxC60NWs), while the superconducting volume fractions changed with x. The highest shielding fraction of a full shielding volume was observed in the material of K3.3C60NW by heating at 200 °C. On the other hand, that of a K-doped fullerene (K-C60) crystal was less than 1%. We report the superconducting behaviors of our newly synthesized KxC60NWs in comparison to those of KxC60 crystals, which show superconductivity at 19 K in K3C60. The lattice structures are also discussed, based on the x-ray diffraction (XRD) analyses.
【 授权许可】
CC BY
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
【 预 览 】
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