Abstract
We have measured the electrical resistivities and magnetoresistances (MR) of (EDT-DSDTFVO)2X (X = FeCl4, GaCl4), where EDT-DSDTFVO stands for ethylenedithiodiselenadithiafulvalenothioquinone-1,3-dithiolemethide. These materials undergo gradual metal-insulator transitions at T min = 52 K for FeCl4-salt and T min = 30 K for GaCl4-salt, respectively. In spite of the similarity of the temperature dependence of the resistivity and its pressure effect, MR of both salts exhibit a clear contrast, i.e. FeCl4-salt shows negative and GaCl4, positive. Origin of the difference in the sign of MR between these salts are discussed in terms of the existence of π-d interaction.
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Li, L., Yasuzuka, S., Weng, Y. et al. Evidence for the π-d Interaction Comparing Magnetoresistance in (EDT-DSDTFVO)2 X, X=FeCl4, GaCl4 . J Low Temp Phys 142, 473–476 (2006). https://doi.org/10.1007/s10909-006-9158-z
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DOI: https://doi.org/10.1007/s10909-006-9158-z