title: Crystal growth and structure and magnetic properties of the 5d oxide Ca3LiOsO6: extended superexchange magnetic interaction in oxide.
abstract: Crystals of the newly synthesized compound Ca(3)LiOsO(6) were grown by a flux method using LiCl and KCl, followed by single-crystal X-ray diffraction (XRD), low-temperature powder XRD, and measurements of ac and dc magnetic susceptibility and specific heat. The data indicate that Ca(3)LiOsO(6) has a fully opened electronic gap with an antiferromagnetic ordered state, consistent with suggestions from the first-principles study. The observed magnetic transition temperature is 117 K, too high to be caused only by a direct spin-spin interaction. It appears that the original superexchange magnetic path Os-O-Os is absent; thus, the extended superexchange path (Os-O)-(O-Os) can be expected to be responsible for the 117 K magnetic order. If this is true, Ca(3)LiOsO(6) would be highly valuable to study the nature of extended superexchange magnetic interactions in solids.
authors.affiliation: International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
authors.forename: Youguo
authors.initials: Y
authors.lastname: Shi
authors.forename: Yanfeng
authors.initials: Y
authors.lastname: Guo
authors.forename: Shan
authors.initials: S
authors.lastname: Yu
authors.forename: Masao
authors.initials: M
authors.lastname: Arai
authors.forename: Akira
authors.initials: A
authors.lastname: Sato
authors.forename: Alexei A
authors.initials: AA
authors.lastname: Belik
authors.forename: Kazunari
authors.initials: K
authors.lastname: Yamaura
authors.forename: Eiji
authors.initials: E
authors.lastname: Takayama-Muromachi