UNIGE document Scientific Article
previous document  unige:14682  next document
add to browser collection

Competition Between Photo-Excitation and Relaxation in Spin Crossover Complexes in The Frame of a Mechano-Elastic Model

Stoleriu, L.
Stancu, A.
Published in Physical Review. B, Condensed Matter. 2010, vol. 82, p. 104114
Abstract In this paper we use a recently proposed elastic model in order to study the competition between linear photoexcitation and cooperative relaxation in spin-crossover molecular magnets. The difference in molecular size between the two possible spin states, that is, the high-spin and the low-spin states, respectively, induces distortions of the crystal lattice. These determine the elastic interactions between molecules, treated here as connecting springs that are either compressed or extended from their equilibrium length, thus modulating the local probability for the high-spin→low-spin relaxation. The crossover of individual molecules within the lattice is checked by a standard Monte Carlo procedure. Using very simple assumptions and a minimum number of parameters, photoexcitation curves and hysteresis loops under continuous irradiation below the thermal transition temperature can thus be simulated. The formation of clusters is analyzed and the presence of inhomogeneities in the system is investigated.
Stable URL https://archive-ouverte.unige.ch/unige:14682
Full text
Article - document accessible for UNIGE members only Limited access to UNIGE
Other version: http://prb.aps.org/pdf/PRB/v82/i10/e104114

200 hits

0 download


Deposited on : 2011-03-18

Export document
Format :
Citation style :