First glimpse of the soft x-ray induced excited spin-state trapping effect dynamics on spin cross-over molecules

Davesne, V.; Gruber, M.; Miyamachi, T.; Da Costa, V.; Boukari, S.; Scheurer, F.; Joly, L.; Bowen, M.; Beaurepaire, E.; Ohresser, P.; Otero, E.; Choueikani, F.; Gaspar, A. B.; Real, J. A.; Wulfhekel, W.

doi:10.1063/1.4818603

Title: First glimpse of the soft x-ray induced excited spin-state trapping effect dynamics on spin cross-over molecules

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Abstract

The dynamics of the soft x-ray induced excited spin state trapping (SOXIESST) effect of Fe(phen){sub 2}(NCS){sub 2} (Fe-phen) powder have been investigated by x-ray absorption spectroscopy (XAS) using the total electron yield method, in a wide temperature range. The low-spin (LS) state is excited into the metastable high-spin (HS) state at a rate that depends on the intensity of the x-ray illumination it receives, and both the temperature and the intensity of the x-ray illumination will affect the maximum HS proportion that is reached. We find that the SOXIESST HS spin state transforms back to the LS state at a rate that is similar to that found for the light induced excited spin state trapping (LIESST) effect. We show that it is possible to use the SOXIESST effect in combination with the LIESST effect to investigate the influence of cooperative behavior on the dynamics of both effects. To investigate the impact of molecular cooperativity, we compare our results on Fe-phen with those obtained for Fe([Me{sub 2}Pyrz]{sub 3}BH){sub 2} (Fe-pyrz) powder, which exhibits a similar thermal transition temperature but with a hysteresis. We find that, while the time constant of the dynamic is identical for both molecules, the SOXIESST effect ismore »« less

Authors:

Davesne, V.; Gruber, M. ^[1]; Miyamachi, T. ^[2]; Da Costa, V.; Boukari, S.; Scheurer, F.; Joly, L.; Bowen, M.; Beaurepaire, E. ^[1]; Ohresser, P.; Otero, E.; Choueikani, F. ^[3]; Gaspar, A. B.; Real, J. A. ^[4]; Wulfhekel, W. ^[5]

Institut de Physique et de Chimie des Matériaux de Strasbourg, Université de Strasbourg, CNRS UMR 7504 23 rue du Loess, 67034 Strasbourg (France)
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwashi, Chiba 277-8581 (Japan)
Synchrotron SOLEIL, L’Orme des Merisiers, Saint-Aubin, BP48, 91192 Gif-sur-Yvette (France)
Institut of Molecular Science, Universitat de València, Edifici de Instituts de Paterna, Apartat de Correus 22085, 46071 València (Spain)
Physikalisches Institut, Karlsruhe Institut of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe (Germany)

Publication Date:: Wed Aug 21 00:00:00 EDT 2013

OSTI Identifier:: 22220481

Resource Type:: Journal Article

Journal Name:: Journal of Chemical Physics

Additional Journal Information:: Journal Volume: 139; Journal Issue: 7; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-9606

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 74 ATOMIC AND MOLECULAR PHYSICS; 36 MATERIALS SCIENCE; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ABSORPTION SPECTROSCOPY; EXCITED STATES; HYSTERESIS; SOFT X RADIATION; SPIN; TRANSITION TEMPERATURE; TRAPPING; X-RAY SPECTROSCOPY

Citation Formats


                    Davesne, V., Gruber, M., Physikalisches Institut, Karlsruhe Institut of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Miyamachi, T., Da Costa, V., Boukari, S., Scheurer, F., Joly, L., Bowen, M., Beaurepaire, E., Ohresser, P., Otero, E., Choueikani, F., Gaspar, A. B., Real, J. A., and Wulfhekel, W. First glimpse of the soft x-ray induced excited spin-state trapping effect dynamics on spin cross-over molecules.  United States: N. p., 2013. 
        Web.  doi:10.1063/1.4818603.

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                    Davesne, V., Gruber, M., Physikalisches Institut, Karlsruhe Institut of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Miyamachi, T., Da Costa, V., Boukari, S., Scheurer, F., Joly, L., Bowen, M., Beaurepaire, E., Ohresser, P., Otero, E., Choueikani, F., Gaspar, A. B., Real, J. A., & Wulfhekel, W. First glimpse of the soft x-ray induced excited spin-state trapping effect dynamics on spin cross-over molecules.  United States.  https://doi.org/10.1063/1.4818603

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                    Davesne, V., Gruber, M., Physikalisches Institut, Karlsruhe Institut of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Miyamachi, T., Da Costa, V., Boukari, S., Scheurer, F., Joly, L., Bowen, M., Beaurepaire, E., Ohresser, P., Otero, E., Choueikani, F., Gaspar, A. B., Real, J. A., and Wulfhekel, W. 2013.  
        "First glimpse of the soft x-ray induced excited spin-state trapping effect dynamics on spin cross-over molecules".  United States.  https://doi.org/10.1063/1.4818603.

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@article{osti_22220481,

  title        = {First glimpse of the soft x-ray induced excited spin-state trapping effect dynamics on spin cross-over molecules},

  author       = {Davesne, V. and Gruber, M. and Physikalisches Institut, Karlsruhe Institut of Technology, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe and Miyamachi, T. and Da Costa, V. and Boukari, S. and Scheurer, F. and Joly, L. and Bowen, M. and Beaurepaire, E. and Ohresser, P. and Otero, E. and Choueikani, F. and Gaspar, A. B. and Real, J. A. and Wulfhekel, W.},

  abstractNote = {The dynamics of the soft x-ray induced excited spin state trapping (SOXIESST) effect of Fe(phen){sub 2}(NCS){sub 2} (Fe-phen) powder have been investigated by x-ray absorption spectroscopy (XAS) using the total electron yield method, in a wide temperature range. The low-spin (LS) state is excited into the metastable high-spin (HS) state at a rate that depends on the intensity of the x-ray illumination it receives, and both the temperature and the intensity of the x-ray illumination will affect the maximum HS proportion that is reached. We find that the SOXIESST HS spin state transforms back to the LS state at a rate that is similar to that found for the light induced excited spin state trapping (LIESST) effect. We show that it is possible to use the SOXIESST effect in combination with the LIESST effect to investigate the influence of cooperative behavior on the dynamics of both effects. To investigate the impact of molecular cooperativity, we compare our results on Fe-phen with those obtained for Fe([Me{sub 2}Pyrz]{sub 3}BH){sub 2} (Fe-pyrz) powder, which exhibits a similar thermal transition temperature but with a hysteresis. We find that, while the time constant of the dynamic is identical for both molecules, the SOXIESST effect is less efficient at exciting the HS state in Fe-pyrz than in Fe-phen.},

  doi          = {10.1063/1.4818603},

  url          = {https://www.osti.gov/biblio/22220481},
  journal      = {Journal of Chemical Physics},

  issn         = {0021-9606},

  number       = 7,

  volume       = 139,

  place        = {United States},

  year         = {Wed Aug 21 00:00:00 EDT 2013},

  month        = {Wed Aug 21 00:00:00 EDT 2013}

}

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