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Robust Room Temperature Hysteresis in an Fe III Spin Crossover Metallomesogen
Author(s) -
Fitzpatrick Anthony J.,
Martinho Paulo N.,
Gildea Brendan J.,
Holbrey John D.,
Morgan Grace G.
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201501335
Subject(s) - thermal hysteresis , differential scanning calorimetry , chemistry , spin crossover , hysteresis , temperature cycling , thermal , magnetic hysteresis , calorimetry , phase (matter) , condensed matter physics , analytical chemistry (journal) , chemical physics , nuclear magnetic resonance , crystallography , phase transition , thermodynamics , magnetization , magnetic field , organic chemistry , physics , quantum mechanics
The high temperature magnetic and structural properties of an amphiphilic iron(III) spin crossover complex are reported. Thermal cycling reveals a scan rate‐dependent 20 K thermal hysteresis in the m T vs. T data close to room temperature. A fast scan rate is essential for the hysteresis but it is robust and reproducible after multiple thermal cycles. Differential scanning calorimetry and cross polarized microscopy are used to show that the magnetic switching aligns with a material state change from solid to ordered liquid phase on warming.