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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 11, Number 3
BKCSDE 11(3)
March 20, 1990 

Electronic Localization Due to Fluorine in YBa2Cu3OxFy Superconducting Materials
Keu Hong Kim*, Don Kim, Seung Koo Cho, Yong Wook Choi, Jong Sik Park, Jae Shi Choi
High-Tc superconducting materials, YBa2Cu3OxFy with x≤6.89 and 0.25≤y≤0.35, were prepared and Studied by X-ray diffraction, magnetic susceptibility and resistivity measurement. Under given conditions, reproducible resistivities were obtained, which increased with increase in the amount of fluorine. The introduced fluorine atoms were found to be localized in pyramidal Cu-O units rather than in Cu-O chains. It is suggested that the localized fluorine atom increases the electronic lolcalization of the superconducting electrons.
191 - 194
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