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. 2017 Mar 20;56(6):3310-3314.
doi: 10.1021/acs.inorgchem.6b02685. Epub 2017 Mar 10.

Giant Exchange Coupling Evidenced with a Magnetization Jump at 52 T for a Gadolinium-Nitroxide Chelate

Takuya Kanetomo  1 , Takumi Kihara  2 , Atsushi Miyake  3 , Akira Matsuo  3 , Masashi Tokunaga  3 , Koichi Kindo  3 , Hiroyuki Nojiri  2 , Takayuki Ishida  1
Affiliations

Giant Exchange Coupling Evidenced with a Magnetization Jump at 52 T for a Gadolinium-Nitroxide Chelate

Takuya Kanetomo et al. Inorg Chem. .

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.

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