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IOP Publishing, Applied Physics Express, 1(3), p. 016601, 2010

DOI: 10.1143/apex.3.016601

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Simultaneous Measurements of Picosecond Lattice and Charge Dynamics in Co--Fe Cyanides

Journal article published in 2010 by Yoshimitsu Fukuyama, Nobuhiro Yasuda, Hayato Kamioka, Jungeun Kim, Takayuki Shibata, Hitoshi Osawa, Takeshi Nakagawa, Haruno Murayama, Kenichi Kato, Yoshihito Tanaka, Shigeru Kimura ORCID, Takashi Ohshima, Hitoshi Tanaka, Masaki Takata, Yutaka Moritomo
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Simultaneous measurements of picosecond time-resolved synchrotron-radiation (SR) X-ray diffraction and femtosecond time-resolved visible absorption were performed at BL40XU beamline of SPring-8 on two films of Co--Fe cyanides, Na0.77Co[Fe(CN)6]0.902.9H2O (NCF90) and Na0.16Co[Fe(CN)6]0.713.8H2O (NCF71). The simultaneous measurements unambiguously revealed that the photoinduced charge transfer between the Co and Fe sites causes uniform volume expansion/contraction within 100 ps. The photoinduced lattice contraction observed in the NCF71 film can be interpreted in terms of the photoinduced formation of a hidden metastable phase.