A symmetry-breaking spin-state transition in iron(III)

Griffin, Michael; Shakespeare, Stephen; Shepherd, Helena J.; Harding, Charles J.; Létard, Jean-François.; Desplanches, Cédric; Goeta, Andrés E.; Howard, Judith A.K.; Powell, Annie K.; Mereacre, Valeriu; Garcia, Yann; Naik, Anil D.; Müller-Bunz, Helge and Morgan, Grace G. (2011). A symmetry-breaking spin-state transition in iron(III). Angewandte Chemie International Edition, 50(4) pp. 896–900.

DOI: https://doi.org/10.1002/anie.201005545


Stepping up: A two-step magnetic spin transition with accompanying structural phase transitions is reported for the first time for FeIII. The transitions are observed at 187 K and 90 K on cooling with a hysteretic transition recorded upon heating during the first crossover at 106 K. The intermediate phase persists over 97 K and contains an unprecedented [HS-HS-LS] motif with tripling of the unit cell.

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