Lanthanide double-decker complexes functioning as magnets at the single-molecular level |
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Authors: | Ishikawa Naoto Sugita Miki Ishikawa Tadahiko Koshihara Shin-Ya Kaizu Youkoh |
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Institution: | Department of Chemistry,Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8551, Japan. ishikawa@chem.titech.ac.jp |
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Abstract: | Double-decker phthalocyanine complexes with Tb3+ or Dy3+ showed slow magnetization relaxation as a single-molecular property. The temperature ranges in which the behavior was observed were far higher than that of the transition-metal-cluster single-molecule magnets (SMMs). The significant temperature rise results from a mechanism in the relaxation process different from that in the transition-metal-cluster SMMs. The effective energy barrier for reversal of the magnetic moment is determined by the ligand field around a lanthanide ion, which gives the lowest degenerate substate a large |Jz| value and large energy separations from the rest of the substates in the ground-state multiplets. |
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