Development of Molecular Conductors and Magnets of New Functionality by Spin-Control

分子导体和分子磁体领域在日本非常活跃，历史悠久。本研究项目旨在通过物理学家和化学家在分子导体和分子磁体领域的密切合作，培育分子导体和分子磁体领域之间的新的研究领域。在本项目期间，我们通过结合π施主分子的导电功能和阴离子的磁性功能，开发出了各种具有前所未有的电磁性能的有机磁性超导体。典型的例子是第一个表现出场诱导超导电性的反铁磁性有机超导体κ-(Bits)_2FeBr4和λ-(Bits)_2FeCl4。我们还开发了具有相当高T_&lt；c‘&gt；的手性分子磁体，有望表现出显著的双功能磁光性质，如磁手性二色性。通过这些工作，人们发现了各种多功能的磁性分子体系，其中电子自旋起着至关重要的作用。

The fields of molecular conductors and molecular magnets are very active and have long history in Japan. This research projects aimed to cultivate new research field between the field of molecular conductors and that of molecular magnets by the tight cooperation between physicists and chemists in these fields. During the term of this project, we have developed various magnetic organic superconductors exhibiting unprecedented electro-magnetic properties by combining conduction function of π donor molecules and magnetic function of anions. Typical examples are the first antiferro-magnetic organic superconductor κ-(BETS)_2FeBr_4 and λ-(BETS)_2FeCl_4 exhibiting field-induced superconductivity. We have also developed chiral molecular magnets with fairly high T_<c'> which are expected to show a salient bi-functional magneto-optical properties such as magneto-chiral dichroism. Through these works, various multi-functional magnetic molecular systems, where the electron spins play an essential role have been discovered.