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Issue 2, 2017
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Topotactic fluorination of perovskite strontium ruthenate thin films using polyvinylidene fluoride

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Abstract

We investigated the polyvinylidene fluoride (PVDF)-mediated topotactic fluorination of two perovskite ruthenate thin films with different crystallographic structures, non-layered perovskite SrRuO3 and layered perovskite Sr2RuO4. While the former ruthenate did not react with PVDF, the latter was fluorinated to form Sr2RuO3F2 with a structure that exhibited a largely expanded c-axis. These results indicate that fluorine ions are preferentially inserted into the SrO rocksalt blocks in perovskite ruthenates, and that the oxygen atoms in the precursor oxide were partially removed upon fluorination. Finally, we noted that the Sr2RuO3F2 film was insulating, with a resistivity of 4.1 × 10 Ω cm at 300 K. It should be noted that this resistivity is five orders of magnitude higher than that of the metallic Sr2RuO4 film (6.7 × 10−4 Ω cm).

Graphical abstract: Topotactic fluorination of perovskite strontium ruthenate thin films using polyvinylidene fluoride

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Supplementary files

Article information


Submitted
10 Nov 2016
Accepted
22 Nov 2016
First published
09 Dec 2016

CrystEngComm, 2017,19, 313-317
Article type
Paper

Topotactic fluorination of perovskite strontium ruthenate thin films using polyvinylidene fluoride

K. Kawahara, A. Chikamatsu, T. Katayama, T. Onozuka, D. Ogawa, K. Morikawa, E. Ikenaga, Y. Hirose, I. Harayama, D. Sekiba, T. Fukumura and T. Hasegawa, CrystEngComm, 2017, 19, 313
DOI: 10.1039/C6CE02358D

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