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Photochemical modification of magnetic properties in organic low-dimensional conductors

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Title: Photochemical modification of magnetic properties in organic low-dimensional conductors
Authors: Naito, Toshio Browse this author →KAKEN DB
Kakizaki, Akihiro Browse this author
Wakeshima, Makoto Browse this author
Hinatsu, Yukio Browse this author →KAKEN DB
Inabe, Tamotsu Browse this author
Keywords: Organic charge transfer salt
Low-dimensional conductor/magnet
Photochemical reaction
Conducting/magnetic property
Issue Date: Oct-2009
Publisher: Elsevier Inc.
Journal Title: Journal of Solid State Chemistry
Volume: 182
Issue: 10
Start Page: 2733
End Page: 2742
Publisher DOI: 10.1016/j.jssc.2009.07.032
Abstract: Magnetic properties of organic charge transfer salts Ag(DX)2 (DX = 2,5-dihalogeno-N,N'-dicyanoquinonediimine; X = Cl, Br, I) were modified by UV irradiation from paramagnetism to diamagnetism in an irreversible way. The temperature dependence of susceptibility revealed that such change in magnetic behavior could be continuously controlled by the duration of irradiation. The observation with scanning electron microprobe revealed that the original appearance of samples, e.g. black well-defined needle-shaped shiny single crystals, remained after irradiation irrespective of the irradiation conditions and the duration. Thermochemical analysis and X-ray diffraction Study demonstrated that the change in the physical properties were due to (partial) decomposition of Ag(DX)2 to AgX, which was incorporated in the original Ag(DX)2 lattices. Because the physical properties of low-dimensional organic conductors are very sensitive to lattice defects, even a small amount of AgX could effectively modify the electronic properties of Ag(DX)2 without making the original crystalline appearance collapse.
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 内藤 俊雄

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