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

hal.structure.identifierInstitut de Physique de Rennes [IPR]
dc.contributor.authorWATANABE, Hiroshi
hal.structure.identifierInstitute for Integrated Cell-Material Sciences
dc.contributor.authorTANAKA, Koichiro
hal.structure.identifierObservatoire des Micro et Nano Technologies [OMNT - UMS 2920]
dc.contributor.authorBRÉFUEL, Nicolas
hal.structure.identifierInstitut de Physique de Rennes [IPR]
dc.contributor.authorCAILLEAU, Hervé
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLÉTARD, Jean-François
hal.structure.identifierSynchrotron SOLEIL [SSOLEIL]
dc.contributor.authorRAVY, Sylvain
hal.structure.identifierSynchrotron SOLEIL [SSOLEIL]
dc.contributor.authorFERTEY, Pierre
hal.structure.identifierComputational Materials Science Center
dc.contributor.authorNISHINO, Masamichi
hal.structure.identifierDepartment of Physics
dc.contributor.authorMIYASHITA, Seiji
hal.structure.identifierInstitut de Physique de Rennes [IPR]
dc.contributor.authorCOLLET, Eric
dc.date.issued2016-01-13
dc.identifier.issn2469-9950
dc.description.abstractEnWe 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 as well as during the relaxation process from the photoinduced metastable state. We experimentally evidence that such steps are associated with complex types of long-range and short-range ordering phenomena, resulting from the occupational modulation of bistable molecular magnetic states. The conversion is then described by using two order parameters: the totally symmetric average high spin fraction and the symmetry breaking ordering parameter. The use of the anisotropic next-nearest-neighbor Ising (ANNNI) model allows us to describe the microscopic origin of the ordering, and Monte Carlo simulations reproduce the observed stepwise thermal phase transition as well as the stepwise relaxation from the photoinduced high-spin state to the low-spin state.
dc.description.sponsorshipEtude femtoseconde rayons X et optique de la dynamique ultrarapide de photocommutation de matériaux moléculaires magnétiques - ANR-13-BS04-0002
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enOrdering phenomena of high-spin/low-spin states in stepwise spin-crossover materials described by the ANNNI model
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevB.93.014419
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
bordeaux.journalPhysical Review B
bordeaux.page014419
bordeaux.volume93
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-01255817
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01255817v1
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