title: Giant Exchange Coupling Evidenced with a Magnetization Jump at 52 T for a Gadolinium-Nitroxide Chelate.
abstract: The Gd-radical complex [GdIII(hfac)3(6bpyNO)] (6bpyNO = 2,2'-bipyridin-6-yl tert-butyl nitroxide; Hhfac = 1,1,1,5,5,5-hexafluoropentane-2,4-dione) showed a magnetization jump at 52 T observed in a pulsed-field facility, corresponding to an exchange coupling constant of -17.4 K. Furthermore, hysteretic behavior due to a relatively slow magnetization reversal was recorded around 2 T. From the high-frequency EPR study, the exchange coupling between Gd and radical spins accompanies an anisotropic character, which is responsible for both the broad jump and the slow magnetization reversal.
authors.affiliation: Department of Engineering Science, The University of Electro-Communications , Chofu, Tokyo 182-8585, Japan.
authors.forename: Takuya
authors.identifier: http://orcid.org/0000-0001-5970-9477
authors.initials: T
authors.lastname: Kanetomo
authors.affiliation: Institute for Materials Research, Tohoku University , Sendai, Miyagi 980-8577, Japan.
authors.forename: Takumi
authors.initials: T
authors.lastname: Kihara
authors.affiliation: Institute for Solid State Physics, The University of Tokyo , Kashiwa, Chiba 277-8581, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Miyake
authors.affiliation: Institute for Solid State Physics, The University of Tokyo , Kashiwa, Chiba 277-8581, Japan.
authors.forename: Akira
authors.initials: A
authors.lastname: Matsuo
authors.affiliation: Institute for Solid State Physics, The University of Tokyo , Kashiwa, Chiba 277-8581, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Tokunaga
authors.affiliation: Institute for Solid State Physics, The University of Tokyo , Kashiwa, Chiba 277-8581, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Kindo
authors.affiliation: Institute for Materials Research, Tohoku University , Sendai, Miyagi 980-8577, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nojiri
authors.affiliation: Department of Engineering Science, The University of Electro-Communications , Chofu, Tokyo 182-8585, Japan.
authors.forename: Takayuki
authors.initials: T
authors.lastname: Ishida