Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition material
We investigated by means of optical microscopy (OM) the spatiotemporal features of the thermo-induced spin transition of [Fe(2-pytrz)2{Pd(CN)4}]·3H2O (1) (2-pytrz = 4-(2-pyridyl)-1,2,4,4H-triazole) single crystals having two different shapes (triangle and rectangle). While magnetic and calorimetric...
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| مؤلفون آخرون: | , , , , , |
| منشور في: |
2018
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| الوصول للمادة أونلاين: | http://hdl.handle.net/20.500.12458/344 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045832649&doi=10.1039%2fc8cp00868j&partnerID=40&md5=89c7ff61be30b998e08a05d309773c47 |
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| _version_ | 1857415064366088193 |
|---|---|
| author | Slimani, Ahmed |
| author2 | Fourati, H. Milin, E. Boukheddaden, K. Abid, Y. Triki, S. Chastanet, G. |
| author2_role | author author author author author author |
| author_facet | Slimani, Ahmed Fourati, H. Milin, E. Boukheddaden, K. Abid, Y. Triki, S. Chastanet, G. |
| author_role | author |
| dc.creator.none.fl_str_mv | Slimani, Ahmed Fourati, H. Milin, E. Boukheddaden, K. Abid, Y. Triki, S. Chastanet, G. |
| dc.date.none.fl_str_mv | 2018 2019-02-28T08:30:29Z 2019-02-28T08:30:29Z |
| dc.format.none.fl_str_mv | application/pdf |
| dc.identifier.none.fl_str_mv | 1463-9076 http://hdl.handle.net/20.500.12458/344 10.1039/c8cp00868j https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045832649&doi=10.1039%2fc8cp00868j&partnerID=40&md5=89c7ff61be30b998e08a05d309773c47 |
| dc.language.none.fl_str_mv | en |
| dc.publisher.none.fl_str_mv | Royal Society of Chemistry |
| dc.relation.none.fl_str_mv | Physical Chemistry Chemical Physics 15 20 10142 10154 |
| dc.title.none.fl_str_mv | Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition material |
| dc.type.none.fl_str_mv | Controlled Vocabulary for Resource Type Genres::text::periodical::journal::contribution to journal::journal article |
| description | We investigated by means of optical microscopy (OM) the spatiotemporal features of the thermo-induced spin transition of [Fe(2-pytrz)2{Pd(CN)4}]·3H2O (1) (2-pytrz = 4-(2-pyridyl)-1,2,4,4H-triazole) single crystals having two different shapes (triangle and rectangle). While magnetic and calorimetric measurements, performed on a polycrystalline material, showed the respective average heating and cooling transition temperatures of (Tdown1/2 ∼ 152 K, Tup1/2 ∼ 154 K) and (Tdown1/2 ∼ 160.0 K, Tup1/2 ∼ 163.5 K), OM studies performed on a unique single crystal revealed significantly different switching temperatures (Tdown1/2 ∼ 152 K and Tup1/2 ∼ 162 K). OM investigations showed an interface spreading over all crystals during the spin transition. Thanks to the color contrast between the low-spin (LS) and the high-spin (HS) states, we have been able to follow the real time dynamics of the spin transition between these two spin states, as well as access the thermal hysteresis loop of each single crystal. After image processing, the HS-LS interface's velocity was carefully estimated in the ranges [4.4-8.5] μm s-1 and [2.5-5.5] μm s-1 on cooling and heating, respectively. In addition, we found that the velocity of the interface is shape-dependent, and accelerates nearby the crystal's borders. Interestingly, we observed that during the propagation process, the interface optimizes its shape so as to minimize the excess of elastic energy arising from the lattice parameter misfit between the LS and HS phases. All of these original experimental results are well reproduced using a spatiotemporal model based on the description of the spin-crossover problem as a reaction diffusion phenomenon. © the Owner Societies 2018. |
| id | sorbonner_b5c2d36415f8a1fd181725a6b6511e06 |
| identifier_str_mv | 1463-9076 10.1039/c8cp00868j |
| language_invalid_str_mv | en |
| network_acronym_str | sorbonner |
| network_name_str | Sorbonne University Abu Dhabi repository |
| oai_identifier_str | oai:depot.sorbonne.ae:20.500.12458/344 |
| publishDate | 2018 |
| publisher.none.fl_str_mv | Royal Society of Chemistry |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| spelling | Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition materialSlimani, AhmedFourati, H.Milin, E.Boukheddaden, K.Abid, Y.Triki, S.Chastanet, G.We investigated by means of optical microscopy (OM) the spatiotemporal features of the thermo-induced spin transition of [Fe(2-pytrz)2{Pd(CN)4}]·3H2O (1) (2-pytrz = 4-(2-pyridyl)-1,2,4,4H-triazole) single crystals having two different shapes (triangle and rectangle). While magnetic and calorimetric measurements, performed on a polycrystalline material, showed the respective average heating and cooling transition temperatures of (Tdown1/2 ∼ 152 K, Tup1/2 ∼ 154 K) and (Tdown1/2 ∼ 160.0 K, Tup1/2 ∼ 163.5 K), OM studies performed on a unique single crystal revealed significantly different switching temperatures (Tdown1/2 ∼ 152 K and Tup1/2 ∼ 162 K). OM investigations showed an interface spreading over all crystals during the spin transition. Thanks to the color contrast between the low-spin (LS) and the high-spin (HS) states, we have been able to follow the real time dynamics of the spin transition between these two spin states, as well as access the thermal hysteresis loop of each single crystal. After image processing, the HS-LS interface's velocity was carefully estimated in the ranges [4.4-8.5] μm s-1 and [2.5-5.5] μm s-1 on cooling and heating, respectively. In addition, we found that the velocity of the interface is shape-dependent, and accelerates nearby the crystal's borders. Interestingly, we observed that during the propagation process, the interface optimizes its shape so as to minimize the excess of elastic energy arising from the lattice parameter misfit between the LS and HS phases. All of these original experimental results are well reproduced using a spatiotemporal model based on the description of the spin-crossover problem as a reaction diffusion phenomenon. © the Owner Societies 2018.Royal Society of Chemistry2019-02-28T08:30:29Z2019-02-28T08:30:29Z2018Controlled Vocabulary for Resource Type Genres::text::periodical::journal::contribution to journal::journal articleapplication/pdf1463-9076http://hdl.handle.net/20.500.12458/34410.1039/c8cp00868jhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85045832649&doi=10.1039%2fc8cp00868j&partnerID=40&md5=89c7ff61be30b998e08a05d309773c47enPhysical Chemistry Chemical Physics15201014210154oai:depot.sorbonne.ae:20.500.12458/3442023-12-05T06:07:26Z |
| spellingShingle | Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition material Slimani, Ahmed |
| title | Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition material |
| title_full | Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition material |
| title_fullStr | Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition material |
| title_full_unstemmed | Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition material |
| title_short | Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition material |
| title_sort | Interplay between a crystal's shape and spatiotemporal dynamics in a spin transition material |
| url | http://hdl.handle.net/20.500.12458/344 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045832649&doi=10.1039%2fc8cp00868j&partnerID=40&md5=89c7ff61be30b998e08a05d309773c47 |