Spin-crossover materials: Getting the most from x-ray crystallography

S Pillet - Journal of Applied Physics, 2021 - pubs.aip.org
The physical phenomenon of spin-crossover in molecular crystals is a multiscale process
whose properties rely on the supramolecular organization of the spin-crossover active …

Elastic frustration causing two-step and multistep transitions in spin-crossover solids: Emergence of complex antiferroelastic structures

M Paez-Espejo, M Sy… - Journal of the American …, 2016 - ACS Publications
Two-step and multistep spin transitions are frequently observed in switchable cooperative
molecular solids. They present the advantage to open the way for three-or several-bit …

First Step Towards a Devil's Staircase in Spin‐Crossover Materials

E Trzop, D Zhang, L Piñeiro‐Lopez… - Angewandte …, 2016 - Wiley Online Library
The unprecedented bimetallic 2D coordination polymer {Fe [(Hg (SCN) 3) 2](4, 4′‐bipy) 2}
n exhibits a thermal high‐spin (HS)↔ low‐spin (LS) staircase‐like conversion characterized …

Structure–property relationships and the mechanisms of multistep transitions in spin crossover materials and frameworks

J Cruddas, BJ Powell - Inorganic Chemistry Frontiers, 2020 - pubs.rsc.org
Spin crossover frameworks and molecular crystals display fascinating collective behaviours.
This includes multi-step transitions with hysteresis and a wide variety of long-range ordered …

Two-variable anharmonic model for spin-crossover solids: A like-spin domains interpretation

W Nicolazzi, S Pillet, C Lecomte - Physical Review B—Condensed Matter and …, 2008 - APS
Spin-crossover (SC) complexes are one of the most fascinating examples of molecular
bistability, whose solid-state properties are tightly connected to cooperative interactions …

Ordering phenomena of high-spin/low-spin states in stepwise spin-crossover materials described by the ANNNI model

H Watanabe, K Tanaka, N Bréfuel, H Cailleau… - Physical Review B, 2016 - APS
We study the complex spin-state switching mechanism in a bistable molecular crystal
undergoing a stepwise conversion from high-spin to low-spin states at thermal equilibrium …

Elastic frustration in 1D spin-crossover chains: Evidence of multi-step transitions and self-organizations of the spin states

R Traiche, M Sy, K Boukheddaden - The Journal of Physical …, 2018 - ACS Publications
We consider a 1D elastic spin-crossover (SCO) chain in which each site may be in the low-
spin or in the high-spin (HS) state. The sites interact elastically through a harmonic coupling …

Pressure-induced two-step spin transition with structural symmetry breaking: X-ray diffraction, magnetic, and Raman studies

HJ Shepherd, S Bonnet, P Guionneau, S Bedoui… - Physical Review B …, 2011 - APS
We have used single-crystal x-ray diffraction, Raman spectroscopy, and magnetometry to
investigate the effect of hydrostatic pressures up to 16 kbar on the molecular spin crossover …

Isomorphism between the electro-elastic modeling of the spin transition and Ising-like model with competing interactions: Elastic generation of self-organized spin …

M Ndiaye, Y Singh, H Fourati, M Sy, B Lo… - Journal of Applied …, 2021 - pubs.aip.org
Elastic modeling of spin-crossover materials has boomed remarkably these last years.
Among these models, the electro-elastic model combining spin and lattice degrees of …

Multimetastability, phototrapping, and thermal trapping of a metastable commensurate superstructure in a Fe spin-crossover compound

S Pillet, EE Bendeif, S Bonnet, HJ Shepherd… - Physical Review B …, 2012 - APS
The photoinduced switching and subsequent relaxation regime at cryogenic temperatures of
the two-step spin-crossover compound [Fe (bapbpy)(NCS) 2] has been investigated by time …