Premium
Dynamical Properties of Spin‐Crossover Solids Within the Kinetic Spin‐1 BEG Model in the Presence of a Time‐Dependent Magnetic Field
Author(s) -
Ogou Saliou Bolarinwa,
Oke Djidjoho Toussaint,
Hontinfinde Félix,
Boukheddaden Kamel
Publication year - 2019
Publication title -
advanced theory and simulations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.068
H-Index - 17
ISSN - 2513-0390
DOI - 10.1002/adts.201800192
Subject(s) - condensed matter physics , spin crossover , physics , arrhenius equation , kinetic monte carlo , spin (aerodynamics) , glauber , mean field theory , kinetic energy , hysteresis , prussian blue , relaxation (psychology) , magnetic field , phase transition , monte carlo method , statistical physics , thermodynamics , kinetics , quantum mechanics , scattering , psychology , social psychology , statistics , mathematics , electrode , electrochemistry
Spin‐crossover (SCO) and Prussian blue analogs (PBAs) materials are investigated in 2D with a three‐state Blume–Emery–Griffiths (BEG) model where each spin interacts with its nearest neighbors ( n n ) and may be either in high‐spin (HS) or low‐spin (LS) state. The interactions through the system lattice are temperature‐dependent to account for spin‐phonon interactions. The system is also in contact with an oscillating magnetic field energy. The generated numerical results by the dynamic mean field theory (DMFT) study approach are consistent with those derived by kinetic Monte Carlo (KMC) simulations with Glauber dynamics and Arrhenius transition rates. First‐order transitions with thermally induced hysteresis phenomena have been observed. Near the hysteresis loops, the model exhibits throughout relaxation curves, some fluctuations in the LS phase, strengthened by increasing temperature where this phenomenon becomes temperature‐ and magnetic field‐dependent.