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Pressure Effect on Insulating State in Ferrimagnetic π−d System (EDT-TTFVO)2 FeBr4

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To explore novel physical phenomena related to strong π−d interaction, we measured the resistivity (ρ) and magnetoresistance of the first organic ferrimagnetic π−d system, (EDT-TTFVO)2FeBr4 under high pressures up to 8 GPa, where EDT-TTFVO denotes ethylenedithiotetrathiafulvalenoquinone-1,3-dithiolemethide. At ambient pressure, ρ(T) exhibits resistivity minimum near Tmin ~ 170 K followed by a gradual increase below it. With increasing pressure, Tmin abruptly decreases till 4 GPa, beyond which it slightly increases. The increase of Tmin above 4 GPa is discussed in terms of the enhancement of the π−d interaction by applying pressure.

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Authors and Affiliations

  1. Department of Mathematical Science Graduate School of Science, Osaka City University, Osaka, 558-8585, Japan

    T. Fujimoto, S. Yasuzuka, K. Yokogawa & Keizo Murata

  2. Department of Chemistry, Graduate School of Science, Osaka Pref. University, Sakai, 599-8570, Japan

    T. Hayashi, T. Hiraoka, H. Fujiwara & T. Sugimoto

  3. CREST Japan Science and Technology Agency, Saitama, 332-0012, Japan

    H. Fujiwara & T. Sugimoto

  4. Institute for Solid State Physics (ISSP), University of Tokyo, Chiba, 277-8581, Japan

    M. Hedo & Y. Uwatoko

Authors
  1. T. Fujimoto
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  2. S. Yasuzuka
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  3. K. Yokogawa
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  4. T. Hayashi
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  5. T. Hiraoka
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  6. H. Fujiwara
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  7. T. Sugimoto
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  8. M. Hedo
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  9. Y. Uwatoko
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  10. Keizo Murata
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Corresponding author

Correspondence to T. Fujimoto.

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Fujimoto, T., Yasuzuka, S., Yokogawa, K. et al. Pressure Effect on Insulating State in Ferrimagnetic π−d System (EDT-TTFVO)2 FeBr4 . J Low Temp Phys 142, 617–621 (2006). https://doi.org/10.1007/s10909-006-9102-2

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  • DOI: https://doi.org/10.1007/s10909-006-9102-2

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