Magnetic field-induced spin-crossover transition in [MnIII(taa)] studied by x-ray absorption spectroscopy
作者： Jim Long Her , Yasuhiro H. Matsuda , Motohiro Nakano , Yasuhiro Niwa , Yasuhiro Inada
DOI: 10.1063/1.3691608
关键词: Phase transition 、 XANES 、 X-ray absorption spectroscopy 、 Magnetic field 、 Analytical chemistry 、 Chemistry 、 Hysteresis 、 Transition temperature 、 Magnetic hysteresis 、 Spin crossover
摘要: X-ray absorption near-edge structure (XANES) spectra of Mn in a spin-crossover compound, [MnIII(taa)], was studied pulsed high magnetic fields up to 37 T. The significant changes the XANES spectra, related from low-spin (LS) state high-spin (HS) state, were found be induced by at temperatures down 17 K. fraction field-induced HS states was, most, 30%, and field dependence exhibited hysteresis. observed T = 17 K (T/Tc ∼ 0.4, where Tc (= 46 K) is transition temperature) cannot understood as macroscopic phase transition, because known higher than 55 T low temperatures. LS-HS likely local microscopic single-molecule level.
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