title: Cobalt(II) citrate cubane single-molecule magnet.
abstract: An investigation of the magnetic properties of the cobalt(II) citrate cubane [C(NH 2) 3] 8{Co 4(cit) 4}.4H 2O reveals that the cluster is a new cobalt(II) single-molecule magnet, with an energy barrier to reorientation of the magnetization, Delta E/ k B = 21 K, and tau 0 = 8 x 10 (-7) s. The compound displays distinct, frequency-dependent peaks in the out-of-phase (chi'') component of the ac magnetic susceptibility and magnetization versus field hysteresis loops that are temperature and sweep rate dependent. The hysteresis loops collapse at zero field due to very fast quantum tunneling of the magnetization (QTM).
authors.affiliation: WestCHEM, Department of Chemistry, University of Glasgow, Glasgow G12 8QQ, UK.
authors.forename: Kyle W
authors.initials: KW
authors.lastname: Galloway
authors.forename: Alexander M
authors.initials: AM
authors.lastname: Whyte
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Wernsdorfer
authors.forename: Javier
authors.initials: J
authors.lastname: Sanchez-Benitez
authors.forename: Konstantin V
authors.initials: KV
authors.lastname: Kamenev
authors.forename: Andrew
authors.initials: A
authors.lastname: Parkin
authors.forename: Robert D
authors.initials: RD
authors.lastname: Peacock
authors.forename: Mark
authors.initials: M
authors.lastname: Murrie