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Thermal spin transition in [Fe(NH2-trz)3]Br2 investigated by spectroscopic ellipsometry

hal.structure.identifierGroupe d'Etude de la Matière Condensée [GEMAC]
dc.contributor.authorLOUTETE-DANGUI, E. D.
hal.structure.identifierGroupe d'Etude de la Matière Condensée [GEMAC]
dc.contributor.authorVARRET, François
hal.structure.identifierGroupe d'Etude de la Matière Condensée [GEMAC]
dc.contributor.authorCODJOVI, Epiphane
hal.structure.identifierUniversité de Versailles Saint-Quentin-en-Yvelines [UVSQ]
dc.contributor.authorDAHOO, Pierre-Richard
hal.structure.identifierThe University of Tokyo [UTokyo]
dc.contributor.authorTOKORO, Hiroko
hal.structure.identifierThe University of Tokyo [UTokyo]
dc.contributor.authorOHKOSHI, Shin-Ichi
dc.contributor.authorEYPERT, C.
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorLÉTARD, Jean-François
hal.structure.identifierUniversité de Versailles Saint-Quentin-en-Yvelines [UVSQ]
dc.contributor.authorCOANGA, J. M.
hal.structure.identifierGroupe d'Etude de la Matière Condensée [GEMAC]
dc.contributor.authorBOUKHEDDADEN, K.
dc.date.issued2007
dc.identifier.issn1098-0121
dc.description.abstractEnWe investigated the thermal hysteresis of a pelleted sample of the spin-crossover compound [Fe(NH2-trz)3]Br2 by means of spectroscopic ellipsometry, in the temperature range 264–358 K. The ellipsometric parameters (psi,Delta) have been recorded in the optical range 240–1000 nm. The corresponding absorption and dispersion spectra show temperature-invariant isobestic points located at 240 and 291 nm, respectively. We found that the high-spin-fraction data, derived from the integrated absorption curves, are in excellent agreement with the magnetic data recorded on the same sample. We also investigated the consistency of the optical data by application of the Kramers-Kronig relations, which are well obeyed above ~450 nm. All these results demonstrate that the spectroscopic ellipsometry is well adapted to characterize the spin-crossover transition. We also expect that this nondestructive technique will be highly relevant to investigate the physical properties of thin films of switchable molecular solids, involving a change in the electronic properties upon a thermally or photoinduced phase transition.
dc.language.isoen
dc.publisherAmerican Physical Society
dc.title.enThermal spin transition in [Fe(NH2-trz)3]Br2 investigated by spectroscopic ellipsometry
dc.typeArticle de revue
dc.identifier.doi10.1103/PhysRevB.75.184425
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
bordeaux.journalPhysical Review B: Condensed Matter and Materials Physics (1998-2015)
bordeaux.page184425
bordeaux.volume75
bordeaux.issue18
bordeaux.peerReviewedoui
hal.identifierhal-00169539
hal.version1
hal.popularnon
hal.audienceInternationale
dc.subject.itFe(II)
dc.subject.itSpin crossover
dc.subject.itTriazole
dc.subject.itHysteresis
dc.subject.itSpectroscopic ellipsometry
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00169539v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Physical%20Review%20B:%20Condensed%20Matter%20and%20Materials%20Physics%20(1998-2015)&rft.date=2007&rft.volume=75&rft.issue=18&rft.spage=184425&rft.epage=184425&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=LOUTETE-DANGUI,%20E.%20D.&VARRET,%20Fran%C3%A7ois&CODJOVI,%20Epiphane&DAHOO,%20Pierre-Richard&TOKORO,%20Hiroko&rft.genre=article


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