Open AccessGiant Exchange Coupling Evidenced with a Magnetization Jump at 52 T for a Gadolinium-Nitroxide Chelate
Author(s) -
Takuya Kanetomo,
Takumi Kihara,
Atsushi Miyake,
Akira Matsuo,
Masashi Tokunaga,
Koichi Kindo,
Hiroyuki Nojiri,
Takayuki Ishida
Publication year - 2017
Publication title -
inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 233
eISSN - 1520-510X
pISSN - 0020-1669
DOI - 10.1021/acs.inorgchem.6b02685
Subject(s) - chemistry , magnetization , gadolinium , spins , coupling (piping) , nitroxide mediated radical polymerization , electron paramagnetic resonance , nuclear magnetic resonance , chelation , condensed matter physics , spin (aerodynamics) , coupling constant , magnetic field , inorganic chemistry , thermodynamics , physics , materials science , organic chemistry , radical polymerization , quantum mechanics , copolymer , metallurgy , polymer , particle physics
The Gd-radical complex [Gd III (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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