@article{705c58d1d0f84b1ba64b08176d9eb3b4,
title = "Flux trapping on multi-superconducting phase PAT12-C60-Rb composite: Low-field microwave absorption study",
abstract = "The in-phase and out-of-phase low field microwave absorption (LFMA) signals in a PAT12(C60)0.05Rbx composite, consisting of superconducting granular Rb3C60 grains embedded in host poly(3-alkyltiophene) (PAT12) matrices, are investigated as functions of temperature and the intensity of trapped field. Temperature dependence of the peak field Hp of the out-of-phase and in-phase LFMA obeys the relation Hp∼{1 - (T/Tc2)}1/4 and Hp∼{1 - (T/Tc1)4}1/2 respectively, where Tc2 ( = 22 K) and Tc1 (=26 K) is the critical temperature of respective phase. Threshold field of the flux trapping in the out-of-phase and in-phase LFMA is nearly zero and 150 G respectively. These results support the previous models proposed for the origins of two phases presented in the K-doped CP-C60 composites.",
keywords = "A. fullerenes, A. polymers, A. superconductors",
author = "Hisashi Araki and Hirotake Kajii and Kazuya Tada and Zakhidov, {Anvar A.} and Kyuya Yakushi and Tohru Sekino and Koichi Niihara and Katsumi Yoshino",
note = "Funding Information: The out-of-phase and the in-phase LFMA signals shown in this study reflect the inhomogeneities of Rb-doped PAT12(C6o)0.05 composite consisting of superconducting granular Rb3C60 grains embedded in host PAT12 matrices. Temperature dependence and flux trapping dependence of the peak of LFMA signal suggests that the out-of-phase LFMA is originated from a lot of small crystallites included in the intergranular weak link and the in-phase LFMA from the intergranular S-N-S junction and the 7r junction loop. Present results obtained for the Rb-doped CP-C60 composite support the previous models proposed for the origins of two phases presented in the K-doped CP-C60 composite, Acknowledgements--This work was financially supported by the Research for the Future Program of the Japan Society for the Promotion of Science (Project No. JSPS-RFrF96P00206). The authors thank Kansai Electric Power Co. Ltd for making the facilities available for ESR and LFMA measurements in this study by Bruker ESP 300.",
year = "1997",
month = sep,
doi = "10.1016/S0038-1098(97)00271-8",
language = "English",
volume = "103",
pages = "607--614",
journal = "Solid State Communications",
issn = "0038-1098",
publisher = "Elsevier Limited",
number = "11",
}