Light-induced excited spin-state trapping of Fe2+ observed by electron paramagnetic resonance of Mn2+
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | DAUBRIC, H. | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | BERGER, R. | |
| hal.structure.identifier | Centre de physique moléculaire optique et hertzienne [CPMOH] | |
| dc.contributor.author | KLIAVA, Janis | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CHASTANET, Guillaume | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | NGUYEN, Olivier | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | LÉTARD, Jean-François | |
| dc.date.issued | 2002 | |
| dc.identifier.issn | 1098-0121 | |
| dc.description.abstractEn | We report an observation of the light-induced excited spin state trapping effect of Fe2+ ions using the electron paramagnetic resonance (EPR) technique. The experiment was carried out with a Mn2+-containing molecular crystal of cis-bis(thiocyanato)-bis[(N-2'-pyridylmethylene)-4- (aminobiphenyl)]-iron(II) phase I. First, the photomagnetic properties of the compound were investigated in order to determine the experimental conditions for a complete low-to-high-spin photoconversion of the Fe2+ ions. The photoinduced high-spin fraction and the light-induced thermal Hysteresis studies under light irradiation at 830 nm show that a complete spin photoconversion occurs in the temperature range below 40 K. The Mn2+ EPR spectra recorded at these temperatures clearly show two different patterns corresponding to the low-spin state of Fe2+ (without light irradiation) and to the metastable high-spin state of this ion (under light irradiation), confirming the complete spin photoconversion. The values of the zero-field splitting parameter D for Mn2+ in the low-temperature light-induced high-spin structure are determined by computer simulations of the EPR spectra. These values corroborate the temperature dependence of D obtained using the superposition model for the high-spin state of the compound above the thermal hysteresis loop. | |
| dc.language.iso | en | |
| dc.publisher | American Physical Society | |
| dc.subject.en | Light-induced excited | |
| dc.subject.en | Spin state trapping | |
| dc.subject.en | Fe2+ | |
| dc.subject.en | Ions | |
| dc.subject.en | Eectron paramagnetic resonance | |
| dc.title.en | Light-induced excited spin-state trapping of Fe2+ observed by electron paramagnetic resonance of Mn2+ | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1103/PhysRevB.66.054423 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Physical Review B: Condensed Matter and Materials Physics (1998-2015) | |
| bordeaux.page | 054423 (8 p.) | |
| bordeaux.volume | 66 | |
| bordeaux.issue | 5 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00728017 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00728017v1 | |
| bordeaux.COinS | ctx_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=2002&rft.volume=66&rft.issue=5&rft.spage=054423%20(8%20p.)&rft.epage=054423%20(8%20p.)&rft.eissn=1098-0121&rft.issn=1098-0121&rft.au=DAUBRIC,%20H.&BERGER,%20R.&KLIAVA,%20Janis&CHASTANET,%20Guillaume&NGUYEN,%20Olivier&rft.genre=article |
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