Hysteresis and change of transition temperature in thin films of Fe{[Me2Pyrz]3BH}2, a new sublimable spin-crossover molecule

V. Davesne; M. Gruber; M. Studniarek; W. H. Doh; S. Zafeiratos; L. Joly; F. Sirotti; M. G. Silly; A. B. Gaspar; J. A. Real; G. Schmerber; M. Bowen; W. Weber; S. Boukari; V. Da Costa; J. Arabski; W. Wulfhekel; E. Beaurepaire

doi:10.1063/1.4921309

Hysteresis and change of transition temperature in thin films of Fe{[Me₂Pyrz]₃BH}₂, a new sublimable spin-crossover molecule

V. Davesne
, M. Gruber
, M. Studniarek
, W. H. Doh
, S. Zafeiratos
, L. Joly
, F. Sirotti
, M. G. Silly
, A. B. Gaspar
, J. A. Real
, G. Schmerber
, M. Bowen
, W. Weber
, S. Boukari
, V. Da Costa
, J. Arabski
, W. Wulfhekel
, E. Beaurepaire

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

Thin films of the spin-crossover (SCO) molecule Fe{[Me₂Pyrz]₃BH}₂ (Fe-pyrz) were sublimed on Si/SiO₂ and quartz substrates, and their properties investigated by X-ray absorption and photoemission spectroscopies, optical absorption, atomic force microscopy, and superconducting quantum interference device. Contrary to the previously studied Fe(phen)₂(NCS)₂, the films are not smooth but granular. The thin films qualitatively retain the typical SCO properties of the powder sample (SCO, thermal hysteresis, soft X-ray induced excited spin-state trapping, and light induced excited spin-state trapping) but present intriguing variations even in micrometer-thick films: the transition temperature decreases when the thickness is decreased, and the hysteresis is affected. We explain this behavior in the light of recent studies focusing on the role of surface energy in the thermodynamics of the spin transition in nano-structures. In the high-spin state at room temperature, the films have a large optical gap (∼5 eV), decreasing at thickness below 50 nm, possibly due to film morphology.

langue originale	Anglais
Numéro d'article	194702
journal	Journal of Chemical Physics
Volume	142
Numéro de publication	19
Les DOIs	https://doi.org/10.1063/1.4921309
état	Publié - 21 mai 2015
Modification externe	Oui

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10.1063/1.4921309

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Davesne, V., Gruber, M., Studniarek, M., Doh, W. H., Zafeiratos, S., Joly, L., Sirotti, F., Silly, M. G., Gaspar, A. B., Real, J. A., Schmerber, G., Bowen, M., Weber, W., Boukari, S., Da Costa, V., Arabski, J., Wulfhekel, W., & Beaurepaire, E. (2015). Hysteresis and change of transition temperature in thin films of Fe{[Me₂Pyrz]₃BH}₂, a new sublimable spin-crossover molecule. Journal of Chemical Physics, 142(19), Article 194702. https://doi.org/10.1063/1.4921309

@article{a699fe212c274f2790cb07c97b7b01f4,

title = "Hysteresis and change of transition temperature in thin films of Fe\{[Me2Pyrz]3BH\}2, a new sublimable spin-crossover molecule",

abstract = "Thin films of the spin-crossover (SCO) molecule Fe\{[Me2Pyrz]3BH\}2 (Fe-pyrz) were sublimed on Si/SiO2 and quartz substrates, and their properties investigated by X-ray absorption and photoemission spectroscopies, optical absorption, atomic force microscopy, and superconducting quantum interference device. Contrary to the previously studied Fe(phen)2(NCS)2, the films are not smooth but granular. The thin films qualitatively retain the typical SCO properties of the powder sample (SCO, thermal hysteresis, soft X-ray induced excited spin-state trapping, and light induced excited spin-state trapping) but present intriguing variations even in micrometer-thick films: the transition temperature decreases when the thickness is decreased, and the hysteresis is affected. We explain this behavior in the light of recent studies focusing on the role of surface energy in the thermodynamics of the spin transition in nano-structures. In the high-spin state at room temperature, the films have a large optical gap (∼5 eV), decreasing at thickness below 50 nm, possibly due to film morphology.",

author = "V. Davesne and M. Gruber and M. Studniarek and Doh, \{W. H.\} and S. Zafeiratos and L. Joly and F. Sirotti and Silly, \{M. G.\} and Gaspar, \{A. B.\} and Real, \{J. A.\} and G. Schmerber and M. Bowen and W. Weber and S. Boukari and \{Da Costa\}, V. and J. Arabski and W. Wulfhekel and E. Beaurepaire",

note = "Publisher Copyright: {\textcopyright} 2015 AIP Publishing LLC.",

year = "2015",

month = may,

day = "21",

doi = "10.1063/1.4921309",

language = "English",

volume = "142",

journal = "Journal of Chemical Physics",

issn = "0021-9606",

number = "19",

}

Davesne, V, Gruber, M, Studniarek, M, Doh, WH, Zafeiratos, S, Joly, L, Sirotti, F, Silly, MG, Gaspar, AB, Real, JA, Schmerber, G, Bowen, M, Weber, W, Boukari, S, Da Costa, V, Arabski, J, Wulfhekel, W & Beaurepaire, E 2015, 'Hysteresis and change of transition temperature in thin films of Fe{[Me₂Pyrz]₃BH}₂, a new sublimable spin-crossover molecule', Journal of Chemical Physics, VOL. 142, Numéro 19, 194702. https://doi.org/10.1063/1.4921309

TY - JOUR

T1 - Hysteresis and change of transition temperature in thin films of Fe{[Me2Pyrz]3BH}2, a new sublimable spin-crossover molecule

AU - Davesne, V.

AU - Gruber, M.

AU - Studniarek, M.

AU - Doh, W. H.

AU - Zafeiratos, S.

AU - Joly, L.

AU - Sirotti, F.

AU - Silly, M. G.

AU - Gaspar, A. B.

AU - Real, J. A.

AU - Schmerber, G.

AU - Bowen, M.

AU - Weber, W.

AU - Boukari, S.

AU - Da Costa, V.

AU - Arabski, J.

AU - Wulfhekel, W.

AU - Beaurepaire, E.

PY - 2015/5/21

Y1 - 2015/5/21

N2 - Thin films of the spin-crossover (SCO) molecule Fe{[Me2Pyrz]3BH}2 (Fe-pyrz) were sublimed on Si/SiO2 and quartz substrates, and their properties investigated by X-ray absorption and photoemission spectroscopies, optical absorption, atomic force microscopy, and superconducting quantum interference device. Contrary to the previously studied Fe(phen)2(NCS)2, the films are not smooth but granular. The thin films qualitatively retain the typical SCO properties of the powder sample (SCO, thermal hysteresis, soft X-ray induced excited spin-state trapping, and light induced excited spin-state trapping) but present intriguing variations even in micrometer-thick films: the transition temperature decreases when the thickness is decreased, and the hysteresis is affected. We explain this behavior in the light of recent studies focusing on the role of surface energy in the thermodynamics of the spin transition in nano-structures. In the high-spin state at room temperature, the films have a large optical gap (∼5 eV), decreasing at thickness below 50 nm, possibly due to film morphology.

AB - Thin films of the spin-crossover (SCO) molecule Fe{[Me2Pyrz]3BH}2 (Fe-pyrz) were sublimed on Si/SiO2 and quartz substrates, and their properties investigated by X-ray absorption and photoemission spectroscopies, optical absorption, atomic force microscopy, and superconducting quantum interference device. Contrary to the previously studied Fe(phen)2(NCS)2, the films are not smooth but granular. The thin films qualitatively retain the typical SCO properties of the powder sample (SCO, thermal hysteresis, soft X-ray induced excited spin-state trapping, and light induced excited spin-state trapping) but present intriguing variations even in micrometer-thick films: the transition temperature decreases when the thickness is decreased, and the hysteresis is affected. We explain this behavior in the light of recent studies focusing on the role of surface energy in the thermodynamics of the spin transition in nano-structures. In the high-spin state at room temperature, the films have a large optical gap (∼5 eV), decreasing at thickness below 50 nm, possibly due to film morphology.

UR - https://www.scopus.com/pages/publications/84929643196

U2 - 10.1063/1.4921309

DO - 10.1063/1.4921309

M3 - Article

AN - SCOPUS:84929643196

SN - 0021-9606

VL - 142

JO - Journal of Chemical Physics

JF - Journal of Chemical Physics

IS - 19

M1 - 194702