title: Magnetic-Nonmagnetic Phase Transition with Interlayer Charge Disproportionation of Nb3Trimers in the Cluster Compound Nb3Cl8.
abstract: We grew large single crystals of the cluster magnet Nb3Cl8with a magnetic triangular lattice and investigated its magnetic properties and crystal structure. In Nb3Cl8, the [Nb3]8+cluster has a single unpaired spin, making it an S = 1/2 triangular lattice anti-ferromagnet. At low temperatures, Nb3Cl8exhibits a magnetic-nonmagnetic phase transition driven by a charge disproportionation, in which the paramagnetic [Nb3]8+clusters transform into alternating layers of nonmagnetic [Nb3]7+and [Nb3]9+clusters. The observed exotic phenomenon with the strong correlation between the magnetism and structure are based on the nature of the cluster magnetism.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University , Kyoto 606-8502, Japan.
authors.forename: Yuya
authors.identifier: http://orcid.org/0000-0002-6951-5112
authors.initials: Y
authors.lastname: Haraguchi
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University , Kyoto 606-8502, Japan.
authors.forename: Chishiro
authors.initials: C
authors.lastname: Michioka
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University , Kyoto 606-8502, Japan.
authors.forename: Manabu
authors.initials: M
authors.lastname: Ishikawa
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University , Kyoto 606-8502, Japan.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Nakano
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University , Kyoto 606-8502, Japan.
authors.forename: Hideki
authors.initials: H
authors.lastname: Yamochi
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University , Kyoto 606-8502, Japan.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Ueda
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University , Kyoto 606-8502, Japan.
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Yoshimura