Size dependent thermal hysteresis in spin crossover nanoparticles reflected within a Monte Carlo based Ising-like model

Triazole‐Based One‐Dimensional Spin‐Crossover Coordination Polymers

“…The former method has been patented20a and extended,59 while the latter was also extended and applied to [Fe(Htrz) 3−3x (atrz 3x )][ClO 4 ] 2 , providing NPs as small as 6 nm still showing large hysteresis above room temperature, and allowing to vary the width and temperature range of the SCO hysteresis 60. There are theoretical simulations61 and discussion around the lowest NPs size for which a cooperative SCO can be observed, and this remains an open discussion, as contradictory results have been reported. One of the possible origins is that some of the properties reported have been derived for precipitated NPs, for which aggregation and other effects may have a strong influence on the magnetic properties.…”

Matrix and size effects on the appearance of the thermal hysteresis in 2D spin crossover nanoparticles

“…Indeed, the last years many experimental studies concerned the effect of the system size on the behavior of SC nanoparticle [37][38][39][40][41]. In this context, different values were reported for the critical size, under which a SCO transition loses the first-order character and exhibits a gradual conversion without hysteresis.…”

Multi-Step in 3D Spin Crossover Nanoparticles Simulated by an Ising Model Using Entropic Sampling Monte Carlo Technique

“…It is nowadays commonly accepted that this type of switching phenomenon results from a synergistic effect between intramolecular interactions resulting from the strong bonding between metallic centres favoring an antiferromagnetic-like state (LS-HS-LS-HS,...) and intermolecular interactions of elastic elastic origin favoring domains with the same spin sate (ferromagnetic-like). The origin of the recently discovered three-step transitions [11][12][13] is however far from being understood, with little theoretical studies at present [20][21][22][23][24][25]. Indeed, various models and theoretical techniques have been developed to predict precisely the influence of perturbation factors in the evolution of thermal SCO behavior.…”